Density based traffic light control system

Density based traffic light control system with priorty to Emergency Vehicles using arduino Mega2560

Jun 29, 2022

•

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3 respects

lights

transportation

passenger vehicles

Components and supplies

5 mm LED: Green

Male/Female Jumper Wires

Resistor 1M ohm

5 mm LED: Red

5 mm LED: Yellow

Arduino Mega 2560

Jumper wires (generic)

Through Hole Resistor, 47 kohm

Female/Female Jumper Wires

Resistor 220 ohm

Circular Connector Cable Seal, Heat Shrinkable Sealing Boot

7 Segment LED Display, Red

Tools and machines

Wire Stripper & Cutter, 18-10 AWG / 0.75-4mm² Capacity Wires

Soldering iron (generic)

Solder Flux, Soldering

Solder Wire, Lead Free

Apps and platforms

Arduino IDE

Project description

Code

density arduino mega code

c_cpp

use arduino ide software

1 
2  #define R1 13
3#define Y1 12
4#define G1 11
5#define R2 10
6#define  Y2 9
7#define G2 8
8#define R3 7
9#define Y3 6
10#define G3 5
11#define  R4 4
12#define Y4 3
13#define G4 2
14
15 
16 
17 
18 
19 
20 
21 //Prepare  binary array for all 7 segment to turn on 7 segment at position of a,b,c,d,e,f,g  
22int digit[10] = {0b0111111, 0b0000110, 0b1011011, 0b1001111, 0b1100110, 0b1101101,  0b1111101, 0b0000111, 0b1111111, 0b1101111};
23
24int digit1, digit2; // initialize  individual digit to controll each segment
25
26
27void dis(int num)
28{
29  for (int i = 22; i < 29; i++)
30  {
31    digitalWrite(i, bitRead(digit[num],  i - 22));
32  }
33}
34
35void dis2(int num)
36{
37  for (int i = 40; i < 47;  i++)
38  {
39    digitalWrite(i, bitRead(digit[num], i - 40));
40  }
41}
42
43void  dis3(int num)
44{
45  for (int i = 49; i < 54; i++)
46  {
47    digitalWrite(i,  bitRead(digit[num], i - 49));
48  }
49  int i=54;
50  digitalWrite(A8,bitRead(digit[num],i-49));
51  i++;
52  digitalWrite(A9,bitRead(digit[num],i-49));
53}
54
55
56void dis1(int  num)
57{
58  for (int i = 31; i < 38; i++)
59  {
60    digitalWrite(i, bitRead(digit[num],  i - 31));
61  }
62}
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77void  setup()
78{
79
80int a;
81int b;
82int c;
83int d;
84    pinMode(R1,OUTPUT);
85pinMode(Y1,OUTPUT);
86pinMode(G1,OUTPUT);
87
88pinMode(R2,OUTPUT);
89pinMode(Y2,OUTPUT);
90pinMode(G2,OUTPUT);
91
92pinMode(R3,OUTPUT);
93pinMode(Y3,OUTPUT);
94pinMode(G3,OUTPUT);
95
96pinMode(R4,OUTPUT);
97pinMode(Y4,OUTPUT);
98pinMode(G4,OUTPUT);
99
100
101pinMode(A0,INPUT);
102pinMode(A1,INPUT);
103pinMode(A2,INPUT);
104pinMode(A3,INPUT);
105pinMode(A4,INPUT);
106pinMode(A5,INPUT);
107pinMode(A6,INPUT);
108pinMode(A7,INPUT);
109
110
111
112  
113  for (int i = 22; i < 29; i++)
114  {
115    pinMode(i, OUTPUT); // declare  0-9 th pin as output
116  }
117  pinMode(29, OUTPUT); //declare 7 seg Digit1 pin  as output
118  pinMode(30, OUTPUT);//declare 7 seg Digit2 pin as output
119
120  for (int i = 40; i < 47; i++)
121  {
122    pinMode(i, OUTPUT); // declare 0-9  th pin as output
123  }
124  pinMode(48, OUTPUT); //declare 7 seg Digit1 pin as  output
125  pinMode(47, OUTPUT);//declare 7 seg Digit2 pin as output
126
127 for  (int i = 49; i < 54; i++)
128  {
129    pinMode(i, OUTPUT); // declare 0-9 th pin  as output
130  }
131  pinMode(A8, OUTPUT); 
132  pinMode(A9, OUTPUT);
133  pinMode(A10,  OUTPUT); 
134  pinMode(A11, OUTPUT);
135
136 for (int i = 31; i < 38; i++)
137  {
138    pinMode(i, OUTPUT); // declare 0-9 th pin as output
139  }
140  pinMode(39,  OUTPUT); //declare 7 seg Digit1 pin as output
141  pinMode(38, OUTPUT);//declare  7 seg Digit2 pin as output
142
143pinMode(19,INPUT_PULLUP);
144attachInterrupt(digitalPinToInterrupt(19),ambulance,LOW);
145
146
147
148
149
150
151  
152}
153void loop()
154{
155  road1();
156}
157  void road1()
158  {
159  int  IR1=analogRead(A6);
160  int IR2=analogRead(A7);
161  if(IR1<=60 && IR2<=60)
162  {
163
164
165      digitalWrite(G1,HIGH);
166  digitalWrite(R1,LOW);
167 digitalWrite(Y1,LOW);
168  delay(20);
169  
170  digitalWrite(R2,HIGH);
171  digitalWrite(Y2,LOW);
172   digitalWrite(G2,LOW);
173   delay(20);
174  digitalWrite(R3,HIGH);
175  digitalWrite(Y3,LOW);
176   digitalWrite(G3,LOW);
177   delay(20);
178  digitalWrite(R4,HIGH);
179 digitalWrite(Y4,LOW);
180  digitalWrite(G4,LOW);
181  delay(20);
182
183    
184  for (int j = 90; j>=0; j--)// for lopp to pass value  from 00-99
185  {
186    if(j==10)
187    {
188      digitalWrite(Y2,HIGH);
189       digitalWrite(R2, LOW);
190    }
191    digit2 = j / 10;
192    digit1 = j  % 10;
193    for ( int k = 0; k < 35; k++)// For loop to control the digit control  to print 00-99
194    {
195      digitalWrite(30, HIGH);
196      digitalWrite(29,  LOW);
197      dis(digit2);
198      delay(10);
199    
200      
201        
202      
203      digitalWrite(29, HIGH);
204      digitalWrite(30, LOW);
205      dis(digit1);
206      delay(15);
207    }
208  }
209road2();  
210}
211
212
213else if (IR1<=60  && IR2>60)
214  {
215
216
217      digitalWrite(G1,HIGH);
218  digitalWrite(R1,LOW);
219  digitalWrite(Y1,LOW);
220 delay(20);
221  
222  digitalWrite(R2,HIGH);
223  digitalWrite(Y2,LOW);
224   digitalWrite(G2,LOW);
225   delay(20);
226  digitalWrite(R3,HIGH);
227  digitalWrite(Y3,LOW);
228   digitalWrite(G3,LOW);
229   delay(20);
230  digitalWrite(R4,HIGH);
231 digitalWrite(Y4,LOW);
232  digitalWrite(G4,LOW);
233  delay(20);
234
235 
236
237
238 for (int j = 60; j>=0;  j--)// for lopp to pass value from 00-99
239  {
240    if(j==10)
241    {
242      digitalWrite(Y2,HIGH);
243       digitalWrite(R2, LOW);
244    }
245    digit2 = j / 10;
246    digit1 = j  % 10;
247
248  
249        for ( int k = 0; k < 35; k++)// For loop to control the  digit control to print 00-99
250    {
251      digitalWrite(30, HIGH);
252      digitalWrite(29,  LOW);
253      dis(digit2);
254      delay(10);
255    
256      
257        
258      
259      digitalWrite(29, HIGH);
260      digitalWrite(30, LOW);
261      dis(digit1);
262      delay(15);
263    }
264  }
265  road2();
266}
267
268
269    else if (IR1>60  && IR2>60)
270  {
271
272
273      digitalWrite(G1,HIGH);
274  digitalWrite(R1,LOW);
275  digitalWrite(Y1,LOW);
276 delay(20);
277  
278  digitalWrite(R2,HIGH);
279  digitalWrite(Y2,LOW);
280   digitalWrite(G2,LOW);
281   delay(20);
282  digitalWrite(R3,HIGH);
283  digitalWrite(Y3,LOW);
284   digitalWrite(G3,LOW);
285   delay(20);
286  digitalWrite(R4,HIGH);
287 digitalWrite(Y4,LOW);
288  digitalWrite(G4,LOW);
289  delay(20);
290
291 
292
293
294 for (int j = 30; j>=0;  j--)// for lopp to pass value from 00-99
295  {
296    if(j==10)
297    {
298      digitalWrite(Y2,HIGH);
299       digitalWrite(R2, LOW);
300    }
301    digit2 = j / 10;
302    digit1 = j  % 10;
303
304  
305        for ( int k = 0; k < 35; k++)// For loop to control the  digit control to print 00-99
306    {
307      digitalWrite(30, HIGH);
308      digitalWrite(29,  LOW);
309      dis(digit2);
310      delay(10);
311    
312      
313        
314      
315      digitalWrite(29, HIGH);
316      digitalWrite(30, LOW);
317      dis(digit1);
318      delay(15);
319    }
320  }
321  road2();
322}
323  }
324
325 void road2()
326  {
327 
328int IR3=analogRead(A0);
329int IR4=analogRead(A1);
330int b;
331int a=b;
332
333  if(IR3<=60 && IR4<=60)
334   {
335
336      
337      digitalWrite(G1,LOW);
338  digitalWrite(R1,HIGH);
339 digitalWrite(Y1,LOW);
340 delay(20);
341  
342  digitalWrite(R2,LOW);
343  digitalWrite(Y2,LOW);
344   digitalWrite(G2,HIGH);
345   delay(20);
346  digitalWrite(R3,HIGH);
347  digitalWrite(Y3,LOW);
348   digitalWrite(G3,LOW);
349   delay(20);
350  digitalWrite(R4,HIGH);
351  digitalWrite(Y4,LOW);
352  digitalWrite(G4,LOW);
353  delay(20);
354
355  for (int  j = 90; j>=0; j--)// for lopp to pass value from 00-99
356  {
357    if(j==10)
358    {
359      digitalWrite(Y3,HIGH);
360       digitalWrite(R3, LOW);
361    }
362    digit2 = j / 10;
363    digit1 = j % 10;
364
365  
366        for ( int k =  0; k < 35; k++)// For loop to control the digit control to print 00-99
367    {
368      digitalWrite(39, HIGH);
369      digitalWrite(38, LOW);
370      dis1(digit2);
371      delay(10);
372    
373      
374        
375      
376      digitalWrite(38,  HIGH);
377      digitalWrite(39, LOW);
378      dis1(digit1);
379      delay(15);
380    }
381  }
382  road3();
383}
384
385
386else if(IR3<=60 && IR4>60)
387   {
388
389      
390      digitalWrite(G1,LOW);
391  digitalWrite(R1,HIGH);
392 digitalWrite(Y1,LOW);
393  delay(20);
394  
395  digitalWrite(R2,LOW);
396  digitalWrite(Y2,LOW);
397   digitalWrite(G2,HIGH);
398   delay(20);
399  digitalWrite(R3,HIGH);
400  digitalWrite(Y3,LOW);
401   digitalWrite(G3,LOW);
402   delay(20);
403  digitalWrite(R4,HIGH);
404 digitalWrite(Y4,LOW);
405  digitalWrite(G4,LOW);
406  delay(20);
407
408  for (int j = 60; j>=0; j--)// for lopp to pass value from  00-99
409  {
410    if(j==10)
411    {
412      digitalWrite(Y3,HIGH);
413       digitalWrite(R3,  LOW);
414    }
415    digit2 = j / 10;
416    digit1 = j % 10;
417
418  
419        for  ( int k = 0; k < 35; k++)// For loop to control the digit control to print 00-99
420    {
421      digitalWrite(39, HIGH);
422      digitalWrite(38, LOW);
423      dis1(digit2);
424      delay(10);
425    
426      
427        
428      
429      digitalWrite(38,  HIGH);
430      digitalWrite(39, LOW);
431      dis1(digit1);
432      delay(15);
433    }
434  }
435  road3();
436}
437
438
439else if(IR3>60 && IR4>60)
440   {
441
442      
443      digitalWrite(G1,LOW);
444  digitalWrite(R1,HIGH);
445 digitalWrite(Y1,LOW);
446  delay(20);
447  
448  digitalWrite(R2,LOW);
449  digitalWrite(Y2,LOW);
450   digitalWrite(G2,HIGH);
451   delay(20);
452  digitalWrite(R3,HIGH);
453  digitalWrite(Y3,LOW);
454   digitalWrite(G3,LOW);
455   delay(20);
456  digitalWrite(R4,HIGH);
457 digitalWrite(Y4,LOW);
458  digitalWrite(G4,LOW);
459  delay(20);
460
461  for (int j = 30; j>=0; j--)// for lopp to pass value from  00-99
462  {
463    if(j==10)
464    {
465      digitalWrite(Y3,HIGH);
466       digitalWrite(R3,  LOW);
467    }
468    digit2 = j / 10;
469    digit1 = j % 10;
470
471  
472        for  ( int k = 0; k < 35; k++)// For loop to control the digit control to print 00-99
473    {
474      digitalWrite(39, HIGH);
475      digitalWrite(38, LOW);
476      dis1(digit2);
477      delay(10);
478    
479      
480        
481      
482      digitalWrite(38,  HIGH);
483      digitalWrite(39, LOW);
484      dis1(digit1);
485      delay(15);
486    }
487  }
488  road3();
489}
490 }
491void road3()
492{
493
494int IR5=analogRead(A2);
495int  IR6=analogRead(A3);
496int c;
497int a=c;
498 if (IR5<=60 && IR6<=60)
499  {
500
501
502      digitalWrite(G1,LOW);
503  digitalWrite(R1,HIGH);
504 digitalWrite(Y1,LOW);
505  delay(20);
506  
507  digitalWrite(R2,HIGH);
508  digitalWrite(Y2,LOW);
509   digitalWrite(G2,LOW);
510   delay(20);
511  digitalWrite(R3,LOW);
512  digitalWrite(Y3,LOW);
513   digitalWrite(G3,HIGH);
514   delay(20);
515  digitalWrite(R4,HIGH);
516 digitalWrite(Y4,LOW);
517  digitalWrite(G4,LOW);
518  delay(20);
519
520 
521
522
523 for (int j = 90; j>=0; j--)// for lopp to pass  value from 00-99
524  {
525    if(j==10)
526    {
527      digitalWrite(Y4,HIGH);
528       digitalWrite(R4, LOW);
529    }
530    digit2 = j / 10;
531    digit1 = j  % 10;
532
533  
534        for ( int k = 0; k < 35; k++)// For loop to control the  digit control to print 00-99
535    {
536      digitalWrite(47, HIGH);
537      digitalWrite(48,  LOW);
538      dis2(digit2);
539      delay(10);
540    
541      
542        
543      
544      digitalWrite(48, HIGH);
545      digitalWrite(47, LOW);
546      dis2(digit1);
547      delay(15);
548    }
549  }
550  road4();
551}
552
553
554  else if (IR5<=60  && IR6>60)
555  {
556
557
558      digitalWrite(G1,LOW);
559  digitalWrite(R1,HIGH);
560  digitalWrite(Y1,LOW);
561 delay(20);
562  
563  digitalWrite(R2,HIGH);
564  digitalWrite(Y2,LOW);
565   digitalWrite(G2,LOW);
566   delay(20);
567  digitalWrite(R3,LOW);
568  digitalWrite(Y3,LOW);
569   digitalWrite(G3,HIGH);
570   delay(20);
571  digitalWrite(R4,HIGH);
572 digitalWrite(Y4,LOW);
573  digitalWrite(G4,LOW);
574  delay(20);
575
576
577     for (int j = 60; j>=0; j--)//  for lopp to pass value from 00-99
578  {
579    if(j==10)
580    {
581      digitalWrite(Y4,HIGH);
582       digitalWrite(R4, LOW);
583    }
584    digit2 = j / 10;
585    digit1 = j  % 10;
586
587  
588        for ( int k = 0; k < 35; k++)// For loop to control the  digit control to print 00-99
589    {
590      digitalWrite(47, HIGH);
591      digitalWrite(48,  LOW);
592      dis2(digit2);
593      delay(10);
594    
595      
596        
597      
598      digitalWrite(48, HIGH);
599      digitalWrite(47, LOW);
600      dis2(digit1);
601      delay(15);
602    }
603  }
604  road4();
605}
606
607  
608 else if(IR5>60  && IR6>60)
609   {
610
611      
612      digitalWrite(G1,LOW);
613  digitalWrite(R1,HIGH);
614  digitalWrite(Y1,LOW);
615 delay(20);
616  
617  digitalWrite(R2,HIGH);
618  digitalWrite(Y2,LOW);
619   digitalWrite(G2,LOW);
620   delay(20);
621  digitalWrite(R3,LOW);
622  digitalWrite(Y3,LOW);
623   digitalWrite(G3,HIGH);
624   delay(20);
625  digitalWrite(R4,HIGH);
626 digitalWrite(Y4,LOW);
627  digitalWrite(G4,LOW);
628  delay(20);
629
630
631     for (int j = 30; j>=0; j--)//  for lopp to pass value from 00-99
632  {
633    if(j==10)
634    {
635      digitalWrite(Y4,HIGH);
636       digitalWrite(R4, LOW);
637    }
638    digit2 = j / 10;
639    digit1 = j  % 10;
640
641  
642        for ( int k = 0; k < 35; k++)// For loop to control the  digit control to print 00-99
643    {
644      digitalWrite(47, HIGH);
645      digitalWrite(48,  LOW);
646      dis2(digit2);
647      delay(10);
648    
649      
650        
651      
652      digitalWrite(48, HIGH);
653      digitalWrite(47, LOW);
654      dis2(digit1);
655      delay(15);
656    }
657  }
658  road4();
659}
660}
661
662void road4() {
663
664int  IR7=analogRead(A4);
665int IR8=analogRead(A5);
666int d;
667int a=d;
668 if(IR7<=60  && IR8<=60)
669   {
670
671      
672      digitalWrite(G1,LOW);
673  digitalWrite(R1,HIGH);
674  digitalWrite(Y1,LOW);
675 delay(20);
676  
677  digitalWrite(R2,HIGH);
678  digitalWrite(Y2,LOW);
679   digitalWrite(G2,LOW);
680   delay(20);
681  digitalWrite(R3,HIGH);
682  digitalWrite(Y3,LOW);
683   digitalWrite(G3,LOW);
684   delay(20);
685  digitalWrite(R4,LOW);
686 digitalWrite(Y4,LOW);
687  digitalWrite(G4,HIGH);
688  delay(20);
689
690  for (int j = 90; j>=0; j--)//  for lopp to pass value from 00-99
691  {
692    if(j==10)
693    {
694      digitalWrite(Y1,HIGH);
695       digitalWrite(R1, LOW);
696    }
697    digit2 = j / 10;
698    digit1 = j  % 10;
699
700  
701        for ( int k = 0; k < 35; k++)// For loop to control the  digit control to print 00-99
702    {
703      digitalWrite(A10, HIGH);
704      digitalWrite(A11,  LOW);
705      dis3(digit2);
706      delay(10);
707    
708      
709        
710      
711      digitalWrite(A11, HIGH);
712      digitalWrite(A10, LOW);
713      dis3(digit1);
714      delay(15);
715    }
716  }
717  road1();
718}     
719
720
721 else if(IR7<=60  && IR8>60)
722   {
723
724      
725      digitalWrite(G1,LOW);
726  digitalWrite(R1,HIGH);
727  digitalWrite(Y1,LOW);
728 delay(20);
729  
730  digitalWrite(R2,HIGH);
731  digitalWrite(Y2,LOW);
732   digitalWrite(G2,LOW);
733   delay(20);
734  digitalWrite(R3,HIGH);
735  digitalWrite(Y3,LOW);
736   digitalWrite(G3,LOW);
737   delay(20);
738  digitalWrite(R4,LOW);
739 digitalWrite(Y4,LOW);
740  digitalWrite(G4,HIGH);
741  delay(20);
742
743  for (int j = 60; j>=0; j--)//  for lopp to pass value from 00-99
744  {
745    if(j==10)
746    {
747      digitalWrite(Y1,HIGH);
748       digitalWrite(R1, LOW);
749    }
750    digit2 = j / 10;
751    digit1 = j  % 10;
752
753  
754        for ( int k = 0; k < 35; k++)// For loop to control the  digit control to print 00-99
755    {
756      digitalWrite(A10, HIGH);
757      digitalWrite(A11,  LOW);
758      dis3(digit2);
759      delay(10);
760    
761      
762        
763      
764      digitalWrite(A11, HIGH);
765      digitalWrite(A10, LOW);
766      dis3(digit1);
767      delay(15);
768    }
769  }
770  road1();
771}     
772
773     
774  else  if(IR7>60 && IR8>60)
775   {
776
777      
778      digitalWrite(G1,LOW);
779  digitalWrite(R1,HIGH);
780  digitalWrite(Y1,LOW);
781 delay(20);
782  
783  digitalWrite(R2,HIGH);
784  digitalWrite(Y2,LOW);
785   digitalWrite(G2,LOW);
786   delay(20);
787  digitalWrite(R3,HIGH);
788  digitalWrite(Y3,LOW);
789   digitalWrite(G3,LOW);
790   delay(20);
791  digitalWrite(R4,LOW);
792 digitalWrite(Y4,LOW);
793  digitalWrite(G4,HIGH);
794  delay(20);
795
796  for (int j = 30; j>=0; j--)//  for lopp to pass value from 00-99
797  {
798    if(j==10)
799    {
800      digitalWrite(Y1,HIGH);
801       digitalWrite(R1, LOW);
802    }
803    digit2 = j / 10;
804    digit1 = j  % 10;
805
806  
807        for ( int k = 0; k < 35; k++)// For loop to control the  digit control to print 00-99
808    {
809      digitalWrite(A10, HIGH);
810      digitalWrite(A11,  LOW);
811      dis3(digit2);
812      delay(10);
813    
814      
815        
816      
817      digitalWrite(A11, HIGH);
818      digitalWrite(A10, LOW);
819      dis3(digit1);
820      delay(15);
821    }
822  }
823  road1();
824}
825}
826
827
828
829
830
831void  ambulance()
832{
833
834   run();
835
836}
837
838void run()
839{
840  int a;
841  int b;
842  int c;
843  int d;
844  if (a==b)
845  {
846     for (int j = 20;  j>=0; j--)// for lopp to pass value from 00-99
847  {
848    
849    digit2 = j  / 10;
850    digit1 = j % 10;
851
852  
853        for ( int k = 0; k < 35; k++)//  For loop to control the digit control to print 00-99
854    {
855      digitalWrite(39,  HIGH);
856      digitalWrite(38, LOW);
857      dis1(digit2);
858      delay(10);
859    
860      
861        
862      
863      digitalWrite(38, HIGH);
864      digitalWrite(39,  LOW);
865      dis1(digit1);
866      delay(15);
867    }
868  }
869    digitalWrite(R2,HIGH);
870  digitalWrite(Y2,LOW);
871   digitalWrite(G2,LOW);
872   delay(20);
873  }  
874
875  else if (a==c)
876   {
877       for (int j = 20; j>=0; j--)// for lopp to pass  value from 00-99
878  {
879    
880    digit2 = j / 10;
881    digit1 = j % 10;
882
883  
884        for ( int k = 0; k < 35; k++)// For loop to control the digit control  to print 00-99
885    {
886      digitalWrite(47, HIGH);
887      digitalWrite(48,  LOW);
888      dis2(digit2);
889      delay(10);
890    
891      
892        
893      
894      digitalWrite(48, HIGH);
895      digitalWrite(47, LOW);
896      dis2(digit1);
897      delay(15);
898    }
899  }
900   digitalWrite(R3,HIGH);
901  digitalWrite(Y3,LOW);
902   digitalWrite(G3,LOW);
903   delay(20);
904   }     
905
906 else if (a==d)
907  {
908    
909     for (int j = 20; j>=0; j--)// for lopp to pass value from 00-99
910  {
911    
912    digit2 = j / 10;
913    digit1 = j % 10;
914
915  
916        for  ( int k = 0; k < 35; k++)// For loop to control the digit control to print 00-99
917    {
918      digitalWrite(A10, HIGH);
919      digitalWrite(A11, LOW);
920      dis3(digit2);
921      delay(10);
922    
923      
924        
925      
926      digitalWrite(A11,  HIGH);
927      digitalWrite(A10, LOW);
928      dis3(digit1);
929      delay(15);
930    }
931  }
932   digitalWrite(R4,HIGH);
933  digitalWrite(Y4,LOW);
934   digitalWrite(G4,LOW);
935   delay(20);
936  
937  }
938          
939
940int  s=analogRead(A13);
941
942  while(s<=500)
943    {
944        
945      digitalWrite(G1,HIGH);
946  digitalWrite(R1,LOW);
947  digitalWrite(Y1,LOW);
948 delay(20);
949  
950  digitalWrite(R2,HIGH);
951  digitalWrite(Y2,LOW);
952   digitalWrite(G2,LOW);
953   delay(20);
954  digitalWrite(R3,HIGH);
955  digitalWrite(Y3,LOW);
956   digitalWrite(G3,LOW);
957   delay(20);
958  digitalWrite(R4,HIGH);
959 digitalWrite(Y4,LOW);
960  digitalWrite(G4,LOW);
961  delay(20);
962 s=analogRead(A13);
963 delay(20);
964  
965    }
966      
967    digitalWrite(G1,LOW);
968  digitalWrite(R1,HIGH);
969  digitalWrite(Y1,LOW);
970 delay(20);
971
972   digitalWrite(G2,HIGH);
973  digitalWrite(R2,LOW);
974  digitalWrite(Y2,LOW);
975 delay(20);
976
977
978  
979    
980}
981

 
  #define R1 13
#define Y1 12
#define G1 11
#define R2 10
#define  Y2 9
#define G2 8
#define R3 7
#define Y3 6
#define G3 5
#define  R4 4
#define Y4 3
#define G4 2

 
 
 
 
 
 
 //Prepare  binary array for all 7 segment to turn on 7 segment at position of a,b,c,d,e,f,g  
int digit[10] = {0b0111111, 0b0000110, 0b1011011, 0b1001111, 0b1100110, 0b1101101,  0b1111101, 0b0000111, 0b1111111, 0b1101111};

int digit1, digit2; // initialize  individual digit to controll each segment


void dis(int num)
{
  for (int i = 22; i < 29; i++)
  {
    digitalWrite(i, bitRead(digit[num],  i - 22));
  }
}

void dis2(int num)
{
  for (int i = 40; i < 47;  i++)
  {
    digitalWrite(i, bitRead(digit[num], i - 40));
  }
}

void  dis3(int num)
{
  for (int i = 49; i < 54; i++)
  {
    digitalWrite(i,  bitRead(digit[num], i - 49));
  }
  int i=54;
  digitalWrite(A8,bitRead(digit[num],i-49));
  i++;
  digitalWrite(A9,bitRead(digit[num],i-49));
}


void dis1(int  num)
{
  for (int i = 31; i < 38; i++)
  {
    digitalWrite(i, bitRead(digit[num],  i - 31));
  }
}














void  setup()
{

int a;
int b;
int c;
int d;
    pinMode(R1,OUTPUT);
pinMode(Y1,OUTPUT);
pinMode(G1,OUTPUT);

pinMode(R2,OUTPUT);
pinMode(Y2,OUTPUT);
pinMode(G2,OUTPUT);

pinMode(R3,OUTPUT);
pinMode(Y3,OUTPUT);
pinMode(G3,OUTPUT);

pinMode(R4,OUTPUT);
pinMode(Y4,OUTPUT);
pinMode(G4,OUTPUT);


pinMode(A0,INPUT);
pinMode(A1,INPUT);
pinMode(A2,INPUT);
pinMode(A3,INPUT);
pinMode(A4,INPUT);
pinMode(A5,INPUT);
pinMode(A6,INPUT);
pinMode(A7,INPUT);



  
  for (int i = 22; i < 29; i++)
  {
    pinMode(i, OUTPUT); // declare  0-9 th pin as output
  }
  pinMode(29, OUTPUT); //declare 7 seg Digit1 pin  as output
  pinMode(30, OUTPUT);//declare 7 seg Digit2 pin as output

  for (int i = 40; i < 47; i++)
  {
    pinMode(i, OUTPUT); // declare 0-9  th pin as output
  }
  pinMode(48, OUTPUT); //declare 7 seg Digit1 pin as  output
  pinMode(47, OUTPUT);//declare 7 seg Digit2 pin as output

 for  (int i = 49; i < 54; i++)
  {
    pinMode(i, OUTPUT); // declare 0-9 th pin  as output
  }
  pinMode(A8, OUTPUT); 
  pinMode(A9, OUTPUT);
  pinMode(A10,  OUTPUT); 
  pinMode(A11, OUTPUT);

 for (int i = 31; i < 38; i++)
  {
    pinMode(i, OUTPUT); // declare 0-9 th pin as output
  }
  pinMode(39,  OUTPUT); //declare 7 seg Digit1 pin as output
  pinMode(38, OUTPUT);//declare  7 seg Digit2 pin as output

pinMode(19,INPUT_PULLUP);
attachInterrupt(digitalPinToInterrupt(19),ambulance,LOW);






  
}
void loop()
{
  road1();
}
  void road1()
  {
  int  IR1=analogRead(A6);
  int IR2=analogRead(A7);
  if(IR1<=60 && IR2<=60)
  {


      digitalWrite(G1,HIGH);
  digitalWrite(R1,LOW);
 digitalWrite(Y1,LOW);
  delay(20);
  
  digitalWrite(R2,HIGH);
  digitalWrite(Y2,LOW);
   digitalWrite(G2,LOW);
   delay(20);
  digitalWrite(R3,HIGH);
  digitalWrite(Y3,LOW);
   digitalWrite(G3,LOW);
   delay(20);
  digitalWrite(R4,HIGH);
 digitalWrite(Y4,LOW);
  digitalWrite(G4,LOW);
  delay(20);

    
  for (int j = 90; j>=0; j--)// for lopp to pass value  from 00-99
  {
    if(j==10)
    {
      digitalWrite(Y2,HIGH);
       digitalWrite(R2, LOW);
    }
    digit2 = j / 10;
    digit1 = j  % 10;
    for ( int k = 0; k < 35; k++)// For loop to control the digit control  to print 00-99
    {
      digitalWrite(30, HIGH);
      digitalWrite(29,  LOW);
      dis(digit2);
      delay(10);
    
      
        
      
      digitalWrite(29, HIGH);
      digitalWrite(30, LOW);
      dis(digit1);
      delay(15);
    }
  }
road2();  
}


else if (IR1<=60  && IR2>60)
  {


      digitalWrite(G1,HIGH);
  digitalWrite(R1,LOW);
  digitalWrite(Y1,LOW);
 delay(20);
  
  digitalWrite(R2,HIGH);
  digitalWrite(Y2,LOW);
   digitalWrite(G2,LOW);
   delay(20);
  digitalWrite(R3,HIGH);
  digitalWrite(Y3,LOW);
   digitalWrite(G3,LOW);
   delay(20);
  digitalWrite(R4,HIGH);
 digitalWrite(Y4,LOW);
  digitalWrite(G4,LOW);
  delay(20);

 


 for (int j = 60; j>=0;  j--)// for lopp to pass value from 00-99
  {
    if(j==10)
    {
      digitalWrite(Y2,HIGH);
       digitalWrite(R2, LOW);
    }
    digit2 = j / 10;
    digit1 = j  % 10;

  
        for ( int k = 0; k < 35; k++)// For loop to control the  digit control to print 00-99
    {
      digitalWrite(30, HIGH);
      digitalWrite(29,  LOW);
      dis(digit2);
      delay(10);
    
      
        
      
      digitalWrite(29, HIGH);
      digitalWrite(30, LOW);
      dis(digit1);
      delay(15);
    }
  }
  road2();
}


    else if (IR1>60  && IR2>60)
  {


      digitalWrite(G1,HIGH);
  digitalWrite(R1,LOW);
  digitalWrite(Y1,LOW);
 delay(20);
  
  digitalWrite(R2,HIGH);
  digitalWrite(Y2,LOW);
   digitalWrite(G2,LOW);
   delay(20);
  digitalWrite(R3,HIGH);
  digitalWrite(Y3,LOW);
   digitalWrite(G3,LOW);
   delay(20);
  digitalWrite(R4,HIGH);
 digitalWrite(Y4,LOW);
  digitalWrite(G4,LOW);
  delay(20);

 


 for (int j = 30; j>=0;  j--)// for lopp to pass value from 00-99
  {
    if(j==10)
    {
      digitalWrite(Y2,HIGH);
       digitalWrite(R2, LOW);
    }
    digit2 = j / 10;
    digit1 = j  % 10;

  
        for ( int k = 0; k < 35; k++)// For loop to control the  digit control to print 00-99
    {
      digitalWrite(30, HIGH);
      digitalWrite(29,  LOW);
      dis(digit2);
      delay(10);
    
      
        
      
      digitalWrite(29, HIGH);
      digitalWrite(30, LOW);
      dis(digit1);
      delay(15);
    }
  }
  road2();
}
  }

 void road2()
  {
 
int IR3=analogRead(A0);
int IR4=analogRead(A1);
int b;
int a=b;

  if(IR3<=60 && IR4<=60)
   {

      
      digitalWrite(G1,LOW);
  digitalWrite(R1,HIGH);
 digitalWrite(Y1,LOW);
 delay(20);
  
  digitalWrite(R2,LOW);
  digitalWrite(Y2,LOW);
   digitalWrite(G2,HIGH);
   delay(20);
  digitalWrite(R3,HIGH);
  digitalWrite(Y3,LOW);
   digitalWrite(G3,LOW);
   delay(20);
  digitalWrite(R4,HIGH);
  digitalWrite(Y4,LOW);
  digitalWrite(G4,LOW);
  delay(20);

  for (int  j = 90; j>=0; j--)// for lopp to pass value from 00-99
  {
    if(j==10)
    {
      digitalWrite(Y3,HIGH);
       digitalWrite(R3, LOW);
    }
    digit2 = j / 10;
    digit1 = j % 10;

  
        for ( int k =  0; k < 35; k++)// For loop to control the digit control to print 00-99
    {
      digitalWrite(39, HIGH);
      digitalWrite(38, LOW);
      dis1(digit2);
      delay(10);
    
      
        
      
      digitalWrite(38,  HIGH);
      digitalWrite(39, LOW);
      dis1(digit1);
      delay(15);
    }
  }
  road3();
}


else if(IR3<=60 && IR4>60)
   {

      
      digitalWrite(G1,LOW);
  digitalWrite(R1,HIGH);
 digitalWrite(Y1,LOW);
  delay(20);
  
  digitalWrite(R2,LOW);
  digitalWrite(Y2,LOW);
   digitalWrite(G2,HIGH);
   delay(20);
  digitalWrite(R3,HIGH);
  digitalWrite(Y3,LOW);
   digitalWrite(G3,LOW);
   delay(20);
  digitalWrite(R4,HIGH);
 digitalWrite(Y4,LOW);
  digitalWrite(G4,LOW);
  delay(20);

  for (int j = 60; j>=0; j--)// for lopp to pass value from  00-99
  {
    if(j==10)
    {
      digitalWrite(Y3,HIGH);
       digitalWrite(R3,  LOW);
    }
    digit2 = j / 10;
    digit1 = j % 10;

  
        for  ( int k = 0; k < 35; k++)// For loop to control the digit control to print 00-99
    {
      digitalWrite(39, HIGH);
      digitalWrite(38, LOW);
      dis1(digit2);
      delay(10);
    
      
        
      
      digitalWrite(38,  HIGH);
      digitalWrite(39, LOW);
      dis1(digit1);
      delay(15);
    }
  }
  road3();
}


else if(IR3>60 && IR4>60)
   {

      
      digitalWrite(G1,LOW);
  digitalWrite(R1,HIGH);
 digitalWrite(Y1,LOW);
  delay(20);
  
  digitalWrite(R2,LOW);
  digitalWrite(Y2,LOW);
   digitalWrite(G2,HIGH);
   delay(20);
  digitalWrite(R3,HIGH);
  digitalWrite(Y3,LOW);
   digitalWrite(G3,LOW);
   delay(20);
  digitalWrite(R4,HIGH);
 digitalWrite(Y4,LOW);
  digitalWrite(G4,LOW);
  delay(20);

  for (int j = 30; j>=0; j--)// for lopp to pass value from  00-99
  {
    if(j==10)
    {
      digitalWrite(Y3,HIGH);
       digitalWrite(R3,  LOW);
    }
    digit2 = j / 10;
    digit1 = j % 10;

  
        for  ( int k = 0; k < 35; k++)// For loop to control the digit control to print 00-99
    {
      digitalWrite(39, HIGH);
      digitalWrite(38, LOW);
      dis1(digit2);
      delay(10);
    
      
        
      
      digitalWrite(38,  HIGH);
      digitalWrite(39, LOW);
      dis1(digit1);
      delay(15);
    }
  }
  road3();
}
 }
void road3()
{

int IR5=analogRead(A2);
int  IR6=analogRead(A3);
int c;
int a=c;
 if (IR5<=60 && IR6<=60)
  {


      digitalWrite(G1,LOW);
  digitalWrite(R1,HIGH);
 digitalWrite(Y1,LOW);
  delay(20);
  
  digitalWrite(R2,HIGH);
  digitalWrite(Y2,LOW);
   digitalWrite(G2,LOW);
   delay(20);
  digitalWrite(R3,LOW);
  digitalWrite(Y3,LOW);
   digitalWrite(G3,HIGH);
   delay(20);
  digitalWrite(R4,HIGH);
 digitalWrite(Y4,LOW);
  digitalWrite(G4,LOW);
  delay(20);

 


 for (int j = 90; j>=0; j--)// for lopp to pass  value from 00-99
  {
    if(j==10)
    {
      digitalWrite(Y4,HIGH);
       digitalWrite(R4, LOW);
    }
    digit2 = j / 10;
    digit1 = j  % 10;

  
        for ( int k = 0; k < 35; k++)// For loop to control the  digit control to print 00-99
    {
      digitalWrite(47, HIGH);
      digitalWrite(48,  LOW);
      dis2(digit2);
      delay(10);
    
      
        
      
      digitalWrite(48, HIGH);
      digitalWrite(47, LOW);
      dis2(digit1);
      delay(15);
    }
  }
  road4();
}


  else if (IR5<=60  && IR6>60)
  {


      digitalWrite(G1,LOW);
  digitalWrite(R1,HIGH);
  digitalWrite(Y1,LOW);
 delay(20);
  
  digitalWrite(R2,HIGH);
  digitalWrite(Y2,LOW);
   digitalWrite(G2,LOW);
   delay(20);
  digitalWrite(R3,LOW);
  digitalWrite(Y3,LOW);
   digitalWrite(G3,HIGH);
   delay(20);
  digitalWrite(R4,HIGH);
 digitalWrite(Y4,LOW);
  digitalWrite(G4,LOW);
  delay(20);


     for (int j = 60; j>=0; j--)//  for lopp to pass value from 00-99
  {
    if(j==10)
    {
      digitalWrite(Y4,HIGH);
       digitalWrite(R4, LOW);
    }
    digit2 = j / 10;
    digit1 = j  % 10;

  
        for ( int k = 0; k < 35; k++)// For loop to control the  digit control to print 00-99
    {
      digitalWrite(47, HIGH);
      digitalWrite(48,  LOW);
      dis2(digit2);
      delay(10);
    
      
        
      
      digitalWrite(48, HIGH);
      digitalWrite(47, LOW);
      dis2(digit1);
      delay(15);
    }
  }
  road4();
}

  
 else if(IR5>60  && IR6>60)
   {

      
      digitalWrite(G1,LOW);
  digitalWrite(R1,HIGH);
  digitalWrite(Y1,LOW);
 delay(20);
  
  digitalWrite(R2,HIGH);
  digitalWrite(Y2,LOW);
   digitalWrite(G2,LOW);
   delay(20);
  digitalWrite(R3,LOW);
  digitalWrite(Y3,LOW);
   digitalWrite(G3,HIGH);
   delay(20);
  digitalWrite(R4,HIGH);
 digitalWrite(Y4,LOW);
  digitalWrite(G4,LOW);
  delay(20);


     for (int j = 30; j>=0; j--)//  for lopp to pass value from 00-99
  {
    if(j==10)
    {
      digitalWrite(Y4,HIGH);
       digitalWrite(R4, LOW);
    }
    digit2 = j / 10;
    digit1 = j  % 10;

  
        for ( int k = 0; k < 35; k++)// For loop to control the  digit control to print 00-99
    {
      digitalWrite(47, HIGH);
      digitalWrite(48,  LOW);
      dis2(digit2);
      delay(10);
    
      
        
      
      digitalWrite(48, HIGH);
      digitalWrite(47, LOW);
      dis2(digit1);
      delay(15);
    }
  }
  road4();
}
}

void road4() {

int  IR7=analogRead(A4);
int IR8=analogRead(A5);
int d;
int a=d;
 if(IR7<=60  && IR8<=60)
   {

      
      digitalWrite(G1,LOW);
  digitalWrite(R1,HIGH);
  digitalWrite(Y1,LOW);
 delay(20);
  
  digitalWrite(R2,HIGH);
  digitalWrite(Y2,LOW);
   digitalWrite(G2,LOW);
   delay(20);
  digitalWrite(R3,HIGH);
  digitalWrite(Y3,LOW);
   digitalWrite(G3,LOW);
   delay(20);
  digitalWrite(R4,LOW);
 digitalWrite(Y4,LOW);
  digitalWrite(G4,HIGH);
  delay(20);

  for (int j = 90; j>=0; j--)//  for lopp to pass value from 00-99
  {
    if(j==10)
    {
      digitalWrite(Y1,HIGH);
       digitalWrite(R1, LOW);
    }
    digit2 = j / 10;
    digit1 = j  % 10;

  
        for ( int k = 0; k < 35; k++)// For loop to control the  digit control to print 00-99
    {
      digitalWrite(A10, HIGH);
      digitalWrite(A11,  LOW);
      dis3(digit2);
      delay(10);
    
      
        
      
      digitalWrite(A11, HIGH);
      digitalWrite(A10, LOW);
      dis3(digit1);
      delay(15);
    }
  }
  road1();
}     


 else if(IR7<=60  && IR8>60)
   {

      
      digitalWrite(G1,LOW);
  digitalWrite(R1,HIGH);
  digitalWrite(Y1,LOW);
 delay(20);
  
  digitalWrite(R2,HIGH);
  digitalWrite(Y2,LOW);
   digitalWrite(G2,LOW);
   delay(20);
  digitalWrite(R3,HIGH);
  digitalWrite(Y3,LOW);
   digitalWrite(G3,LOW);
   delay(20);
  digitalWrite(R4,LOW);
 digitalWrite(Y4,LOW);
  digitalWrite(G4,HIGH);
  delay(20);

  for (int j = 60; j>=0; j--)//  for lopp to pass value from 00-99
  {
    if(j==10)
    {
      digitalWrite(Y1,HIGH);
       digitalWrite(R1, LOW);
    }
    digit2 = j / 10;
    digit1 = j  % 10;

  
        for ( int k = 0; k < 35; k++)// For loop to control the  digit control to print 00-99
    {
      digitalWrite(A10, HIGH);
      digitalWrite(A11,  LOW);
      dis3(digit2);
      delay(10);
    
      
        
      
      digitalWrite(A11, HIGH);
      digitalWrite(A10, LOW);
      dis3(digit1);
      delay(15);
    }
  }
  road1();
}     

     
  else  if(IR7>60 && IR8>60)
   {

      
      digitalWrite(G1,LOW);
  digitalWrite(R1,HIGH);
  digitalWrite(Y1,LOW);
 delay(20);
  
  digitalWrite(R2,HIGH);
  digitalWrite(Y2,LOW);
   digitalWrite(G2,LOW);
   delay(20);
  digitalWrite(R3,HIGH);
  digitalWrite(Y3,LOW);
   digitalWrite(G3,LOW);
   delay(20);
  digitalWrite(R4,LOW);
 digitalWrite(Y4,LOW);
  digitalWrite(G4,HIGH);
  delay(20);

  for (int j = 30; j>=0; j--)//  for lopp to pass value from 00-99
  {
    if(j==10)
    {
      digitalWrite(Y1,HIGH);
       digitalWrite(R1, LOW);
    }
    digit2 = j / 10;
    digit1 = j  % 10;

  
        for ( int k = 0; k < 35; k++)// For loop to control the  digit control to print 00-99
    {
      digitalWrite(A10, HIGH);
      digitalWrite(A11,  LOW);
      dis3(digit2);
      delay(10);
    
      
        
      
      digitalWrite(A11, HIGH);
      digitalWrite(A10, LOW);
      dis3(digit1);
      delay(15);
    }
  }
  road1();
}
}





void  ambulance()
{

   run();

}

void run()
{
  int a;
  int b;
  int c;
  int d;
  if (a==b)
  {
     for (int j = 20;  j>=0; j--)// for lopp to pass value from 00-99
  {
    
    digit2 = j  / 10;
    digit1 = j % 10;

  
        for ( int k = 0; k < 35; k++)//  For loop to control the digit control to print 00-99
    {
      digitalWrite(39,  HIGH);
      digitalWrite(38, LOW);
      dis1(digit2);
      delay(10);
    
      
        
      
      digitalWrite(38, HIGH);
      digitalWrite(39,  LOW);
      dis1(digit1);
      delay(15);
    }
  }
    digitalWrite(R2,HIGH);
  digitalWrite(Y2,LOW);
   digitalWrite(G2,LOW);
   delay(20);
  }  

  else if (a==c)
   {
       for (int j = 20; j>=0; j--)// for lopp to pass  value from 00-99
  {
    
    digit2 = j / 10;
    digit1 = j % 10;

  
        for ( int k = 0; k < 35; k++)// For loop to control the digit control  to print 00-99
    {
      digitalWrite(47, HIGH);
      digitalWrite(48,  LOW);
      dis2(digit2);
      delay(10);
    
      
        
      
      digitalWrite(48, HIGH);
      digitalWrite(47, LOW);
      dis2(digit1);
      delay(15);
    }
  }
   digitalWrite(R3,HIGH);
  digitalWrite(Y3,LOW);
   digitalWrite(G3,LOW);
   delay(20);
   }     

 else if (a==d)
  {
    
     for (int j = 20; j>=0; j--)// for lopp to pass value from 00-99
  {
    
    digit2 = j / 10;
    digit1 = j % 10;

  
        for  ( int k = 0; k < 35; k++)// For loop to control the digit control to print 00-99
    {
      digitalWrite(A10, HIGH);
      digitalWrite(A11, LOW);
      dis3(digit2);
      delay(10);
    
      
        
      
      digitalWrite(A11,  HIGH);
      digitalWrite(A10, LOW);
      dis3(digit1);
      delay(15);
    }
  }
   digitalWrite(R4,HIGH);
  digitalWrite(Y4,LOW);
   digitalWrite(G4,LOW);
   delay(20);
  
  }
          

int  s=analogRead(A13);

  while(s<=500)
    {
        
      digitalWrite(G1,HIGH);
  digitalWrite(R1,LOW);
  digitalWrite(Y1,LOW);
 delay(20);
  
  digitalWrite(R2,HIGH);
  digitalWrite(Y2,LOW);
   digitalWrite(G2,LOW);
   delay(20);
  digitalWrite(R3,HIGH);
  digitalWrite(Y3,LOW);
   digitalWrite(G3,LOW);
   delay(20);
  digitalWrite(R4,HIGH);
 digitalWrite(Y4,LOW);
  digitalWrite(G4,LOW);
  delay(20);
 s=analogRead(A13);
 delay(20);
  
    }
      
    digitalWrite(G1,LOW);
  digitalWrite(R1,HIGH);
  digitalWrite(Y1,LOW);
 delay(20);

   digitalWrite(G2,HIGH);
  digitalWrite(R2,LOW);
  digitalWrite(Y2,LOW);
 delay(20);


  
    
}

Documentation

Density based traffic control design using proteus tool

use proteus8.12 software to view the circuit

Density based traffic control design using proteus tool

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