1 Finishing the two tables based on the example of roundabou

1. Finishing the two tables based on the example of roundabout capacity analysis. Calculate eastbound entry lane capacity and level of saturation rate. 50 190 280 -610 -395 110 20 PHF Adjustment RT NB SB EB WB TH LE 105/0.94-112 UT Heavy Vehicle Adjustment NB SB EB WB RT TH LE UT 112/0.98=114

Solution

Heavy vehicle

adjustment

PHF = (average flow rate)/(*Peak 15 minute flow rate) = 0.94

Standard Capacity Model (Environment Factor = 1.2)

eastbound entry lane capacity = 298 x 1.2 =357.6 veh/hr

saturation rate = v/c = 298 /357.6 = 0.82

PHF adjustment	NB	SB	EB	WB
RT	53	617	90	649
TH	223	101	298	420
LT	112	186	202	117
UT	32	21	53	21