Density Based Traffic System with emergency override Project Code
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This document contains the code for an Arduino-based traffic light controller with 4 lanes. It defines pin connections for LEDs, buttons, sensors and an LCD display. The main loop cycles through 8 steps to control the traffic lights in a sequence. It also includes functions to handle emergency vehicle overrides from any lane and detect pedestrians pushing buttons to trigger walk signals.
Density Based Traffic System with emergency override Project Code
- 1. #include <LiquidCrystal.h> LiquidCrystal lcd(45,44,49, 48, 47,46); //pedestrianledpins const intled1=23; const intled2=25; const intled3=27; const intled4=29; //pedestrianledbuttons const intbutton_lane1=22; const intbutton_lane2=24; const intbutton_lane3=26; const intbutton_lane4=28; intstate1; intstate2; intstate3; intstate4; //ledpinsforlane 1 const intred1=2;
- 2. const intyellow1=3; const intgreen1=4; //ledpinsforlane 2 const intred2=5; const intyellow2=6; const intgreen2=7; //ledpinsforlane 3 const intred3=8; const intyellow3=9; const intgreen3=10; //ledpinsforlane 4 const intred4= 11; const intyellow4=12; const intgreen4=13; //irsensorspinforlane 1 intir_lane1_a=30 ; intir_lane1_b=31 ; //irsensorspinforlane 2
- 3. intir_lane2_a=32 ; intir_lane2_b=33 ; //irsensorspinforlane 3 intir_lane3_a=40; intir_lane3_b=41; //irsensorspinforlane 4 intir_lane4_a=42; intir_lane4_b=43; intreadsen1a; intreadsen1b; intreadsen2a; intreadsen2b; intreadsen3a; intreadsen3b; intreadsen4a; intreadsen4b; intlane; voidsetup() {
- 4. lcd.begin(16,2); //LED pinsetupfor lane 1 pinMode(red1,OUTPUT); pinMode(yellow1,OUTPUT); pinMode(green1,OUTPUT); //LED pinsetupforlane 2 pinMode(red2,OUTPUT); pinMode(yellow2,OUTPUT); pinMode(green2,OUTPUT); //LED pinsetupforlane 3 pinMode(red3,OUTPUT); pinMode(yellow3,OUTPUT); pinMode(green3,OUTPUT); //LED pinsetupforlane 4 pinMode(red4,OUTPUT); pinMode(yellow4,OUTPUT); pinMode(green4,OUTPUT); //IR pinsetupforlane 1 pinMode(ir_lane1_a,INPUT);
- 5. pinMode(ir_lane1_b,INPUT); //IRpinsetupfor lane 1 pinMode(ir_lane2_a,INPUT); pinMode(ir_lane2_b,INPUT); //IRpinsetupfor lane 1 pinMode(ir_lane3_a,INPUT); pinMode(ir_lane3_b,INPUT); //IRpinsetupfor lane 1 pinMode(ir_lane4_a,INPUT); pinMode(ir_lane4_b,INPUT); // pedestrianpinsetupforlane1 pinMode(button_lane1,INPUT); pinMode(led1,OUTPUT); // pedestrianpinsetupforlane2 pinMode(button_lane2,INPUT); pinMode(led2,OUTPUT); // pedestrianpinsetupforlane3
- 26. readsen2a=digitalRead(ir_lane2_a); readsen2b=digitalRead(ir_lane2_b); readsen3a=digitalRead(ir_lane3_a); readsen3b=digitalRead(ir_lane3_b); readsen4a=digitalRead(ir_lane4_a); readsen4b=digitalRead(ir_lane4_b); if(readsen1a==HIGH|| readsen1b==HIGH||readsen2a==HIGH|| readsen2b==HIGH ||readsen3a==HIGH|| readsen3b==HIGH||readsen4a==HIGH|| readsen4b==HIGH) { if(readsen1b==HIGH) { digitalWrite(red1,LOW); digitalWrite(yellow1,LOW); digitalWrite(green1,HIGH); digitalWrite(red2,HIGH); digitalWrite(yellow2,LOW); digitalWrite(green2,LOW); digitalWrite(red3,HIGH); digitalWrite(yellow3,LOW); digitalWrite(green3,LOW); digitalWrite(red4,HIGH); digitalWrite(yellow4,LOW); digitalWrite(green4,LOW); delay(10000);