1. Signals

10. Laneage Coding Examples

11. N

12. N

13. N

14. N

15. Default Values May be used without compromising analysis Results become approximate As more default values are used

16. Default Values for Use Ideal saturation flow rate = 1,900 pcphpgpl Conflicting pedestrian volume None: 0 peds/hr Low: 50 peds/hr Moderate: 200 peds/hr High: 400 peds/hr Percent heavy vehicles = 2 Grade = 0 No. of stopping buses = 0/hr

17. Parking conditions: No Parking Parking maneuvers = 20/hr, where parking exists Arrival type Lane groups with through movements: 3 if isolated 4 if coordinated Lane group without through movement = 3 Peak-hour factor = 0.90 Lane width = 12 feet Area type = non CBD

18. Right Turns on Red (RTOR) When RTOR is permitted Right turn volume may be reduced Number of vehicles able to turn right on red is a function of: Approach lane uses Right turn demand Sight distance Left-turn phasing on conflicting street Conflicts with pedestrians

19. Arrival Types Quantifies the quality of progression Type 1: dense platoon, arriving at the start of the red, very poor progression Type 2: Moderately dense platoon arriving in the middle of the red phase, unfavorable progression Type 3: random arrivals, isolated intersections

20. Type 4: Moderately dense platoon arriving at the start of the green phase, favorable progression Type 5:Dense to moderately dense platoon, arriving at the start of the green phase, highly favorable progression Type 6: exceptional progression quality on routes with near-ideal characteristics

21. Arrival Type Best observed in the field Approximated by examining time space diagrams R P = P (C/g i ) R P = platoon ratio P = proportion of all vehicles in movement arriving during the green phase C = cycle length g i = effective green time for the movement

22. Relationship between Arrival Type and Platoon Arrival (R P ) ARRIVAL TYPE RANGE OF PLATOON RATIO (R P ) DEFAULT VALUE (R P ) PROGRESSION QUALITY 1≤ 0.500.333Very poor 2> 0.50 and ≤ 0.850.667Unfavorable 3>0.85 and ≤ 1.151.000Random Arrivals 4> 1.15 and ≤ 1.501.333Favorable 5> 1.50 and ≤ 2.001.667Highly favorable 6> 2.002.000Exceptional

23. Effective green time Time that is effectively available to a movement, generally taken to be the green time plus the clearance interval minus the lost time Lost time Time during which the intersection is not effectively used by any movement, which occurs During the clearance interval Start-up delay

24. Example: Arrival Type R P n-s = P (C/g i ) g i = 48 + 6 – 2 – 2 = 50 sec  1 North-South  2 East-West G = 48 sec Y = 4.0 sec AR = 2.0 sec G = 58 sec Y = 4.0 sec AR = 2.0 sec Assume: - 50% of the vehicles in the platoon arrive during the green phase (R P ) = 0.50 - Cycle length = 120 seconds - 2 seconds of lost time North-South R P n-s = 0.50 (120/50) = 1.20 (Arrival Type 4)

25. Exercise #1: Find the Intersection LOS Main Street 470 760 940 380 100 200 180 140 100 280 180 First Street 3   G=5.0 sec Y=4.0 AR = 1.0 G=35.0 sec Y=4.0 AR = 1.0  3  4  G=40.0 sec Y=4.0 AR = 1.0 G=10.0 sec Y=4.0 AR = 1.0 Assume RTOR Volume is 10% of right turn volume

26. Data Input

28. Output

29. Iteration #2   G=5.0 sec Y=4.0 AR = 1.0 G=40.0 sec Y=4.0 AR = 1.0  3  4  G=40.0 sec Y=4.0 AR = 1.0 G=5.0 sec Y=4.0 AR = 1.0 Increasing green time by 5 sec in  1 Decreasing green time by 5 sec in  4

30. Output