3. (3.5 points). A traffic control system needs to be designed to control the lights in Fig. 1. Two sensors are E and L. When E=1 , there is a vehicle toward the east direction: when L=1. there is a vehicle to turn from South to West (left turn) The lights are shown in Fig. 1 East green (EG), East yellow (EY), East red (ER), and Right-turn-only Green (RG); North green (NG), North yellow (NY), North red (NR), and Left-turn-Green (LG) and G-Green, Y-Yellow and R-Red. South green (SG), South yellow (SY), South red (SR) Initially, East green, North red and South red lights are on and others off. After m=20 Sec.. East green is off and East Yellow will be on for a short period d=10 Sec. East Red is on while East yellow is off. Meanwhile, Figure 1. A T-intersection with notation: N-North, E-East, S-South, LG-Left-turn green, RG-Right-turn-only Green, SR SY SG if L-0, both North and South green lights turn on until M-60 Sec. elapses and there is a vehicle from West (or E=1); and if L=l. South Red remains on. But Left-turn green. North green, and East right-turn-only Green lights turn on until L-0 Next Left-turn green and Right-turn-only Green lights turn off (no yellow lights between two stages) while North green remains on and South green light turns on until M-60 Sec. elapses and there is a vehicle After that, both North and South yellow light will be on for initial status, i.e., East green, North red and South red lights from West (or E=1) NY NG d-10 Sec. before they turn into red. Then it returns to the are on and others off A timer can be started when S is high and signals d, m and M will be generated to supply to the controller when the corresponding time 10, 20, and 60 Sec. elapses. Derive the state diagram of this system and its ROM implementation (including the hardware architecture). The size and content of ROM have to be indicated. You have to follow the code assignment for the following selected states States Initial state. EG-NR and SR lights are on and others off. | 0 if vour 4th ID number4 3 if your 6t ID number>4 Codes for the state NG and SG lights are on, and others of 2 if You can arbitrarily assign other codes to other non-specified states. Please indicate any unused state codes. Is your machine a Mealy, Moore type or mixed FSM? Hints: For any unused states regardless the inputs, you must transition to the initial state 6" ID number4 3 if your 6t ID number>4 Codes for the state NG and SG lights are on, and others of 2 if You can arbitrarily assign other codes to other non-specified states. Please indicate any unused state codes. Is your machine a Mealy, Moore type or mixed FSM? Hints: For any unused states regardless the inputs, you must transition to the initial state 6" ID number
