Project Description:

The aim of this project is to design and simulate a traffic controller for a T$-$intersection. The controller has a single input and four outputs.

The intersection shown in Figure $1,$ has traffic coming from three different directions $($A$,$ B$,$ and C$).$

Traffic coming from directions $B$ and $C$ has a single traffic light each, while traffic coming from direction A has $2$ traffic lights as follows:

A$1$: Controls whether the traffic proceeds forward or not.

A$2$: Controls whether the traffic is allowed to go left or not.

In addition, the intersection has a push button $($I$)$ for pedestrians, when pressed it stops all traffic and allows pedestrians to cross.

Figure $1.$ Intersection Diagram

Design Requirements:

The traffic lights at this intersection operate with only two signals: $1$ for Green and $0$ for Red. $($i$.$e$.,$ no Yellow$).$

The traffic at this intersection has $4$ modes $($mode $0,$ mode $1,$ mode $2$ and mode $3).$

The sequence of traffic lights should follow $($mode $1,$ mode $2,$ mode $3,$ mode $1,$ mode $2....$ etc$)$

When the pedestrian button is pressed, the controller should transition to mode $0$ after completing the current mode time.

Once the time for mode $0$ has elapsed, the controller will resume with mode $1,$ mode $2,$ mode $3...$etc.

The details of the different modes are shown in Figure $2$

The period of each mode is defined as follows:

$\backslash$table$[[$Mode$,$Period$],[$Mode $0,30$ seconds$],[$Mode $1,30$ seconds$],[$Mode $2,10$ seconds$],[$Mode $3,20$ seconds$]]$

Assume that the system runs at a $1$ Hz clock.

If you need to create a counter, then it should be designed structurally.