I have red the description you provided.
As part of this offer I will design a state machine(as a diagram)/implement it in VHDL/simulate and finally synthesize the design and capture block diagram. for both traffic light controller and elevator controller.
Hey I am an electrical engineer and have done several projects using xilinx ise with vhdl. I already have a few working modules for this project. so please ping me up with more details so that we can get this done asap.