Final Project: Traffic Lights with Pedestrian Button

This task will complete the traffic light system you began in part $1$ of this project and will

incorporate a pedestrian crossing button$/$switch into the system $($rather than the system

automatically transitioning$)$ and will include a Stateflow Chart block in the model.

A Stateflow Chart is a block in Simulink that allows us to implement finite state$-$machines

$($FSMs$)$ which are systems that can be described as a

set of states that transition depending on certain

conditions being met. Traffic lights are ideal

examples of FSMs; we can consider this system as

being made up of Three $(3)$ states;

$1)$ cars go $($green light$)$ and pedestrians stop $($red

light$),$

$2)$ cars given caution signal $($yellow light$)$ and

pedestrians stop $($red light$),$ and

$3)$ Cars stop $($red light$)$ and pedestrians go $($green light$).$

Part A

Modify the basic structure of the traffic light system you built for part $1$ of this project to

simulate $($use Dashboard components$)$ a FSM version of this system that behaves as follows:

$-$ The system must still consist of Three $(3)$ traffic lights $($red$,$

yellow and green$)$ and Two $(2)$ pedestrian lights $($red and green$).$

$-$ The system must also have a pedestrian button $($a Dashboard

push button$)$ that detects when a person wants to cross the road.

$-$ The FSM must be defined as having Three $(3)$ states only.

$-$ State $1$ allows the traffic to go $($the green traffic and red

pedestrian lights will both be on$,$ all other lights will be off$)$ and

this state will remain active until the pedestrian button is pushed.

$-$ After the pedestrian button is pushed, the system will transition

to state $2$ where the traffic is cautioned for Three $(3)$ seconds $($the yellow$/$amber traffic

and red pedestrian lights will both be on$,$ all other lights will be off$).$

$-$ Finally, state $3$ allows the pedestrian to cross the road for Six $(6)$ seconds $($the red

traffic and green pedestrian lights will be on$,$ all other lights will be off$).$

$-$ The system must then reset back to state $1$ and repeat this process.

For your design methodology, ensure you use an algorithmic state diagram and state

transition table to show how the system should work.