Case Study B2- Right Turn from Minor Road By : Doi Pham Mai Vu Anthony Tran.

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Case Study B2- Right Turn from Minor Road By : Doi Pham Mai Vu Anthony Tran

Case B2 Right Turn from Minor Road

Formula: a= 14.5(ft) L w b= 1.47 V major t g 14.5 is the distance from the decision point to the ETW L w is length wild V major is design speed on major road t g is time gap for minor road vehicle to enter major road (second)

Case B2 Right Turn from Minor Road

The time gap in case B-1 can be decrease by 1.0 s for the right turn maneuvers without undue interference with major-road traffic. The design values based on these adjusted time gaps are shown in Figure 3 for passenger cars. Figure 4 includes the design values for the design vehicle for each of the time gaps in Figure 2.

Case B2 Right Turn from Minor Road

Example: Given: Passenger Car, Single Unit Truck, Combination Truck. V major = 60mph 2 lane road-way 5% upgrade Find: For case B2 find tg, a, b Solution: Governing Equation: a= 14.5(ft) L w (total) b= 1.47 V major t g t g (PC total) = t g (PC) + 0.1*5 t g (SUT total) = t g (SUT) + 0.1*5 t g (CT total) = t g (CT) + 0.1*5 The Result can be calculated by using Excel. We can check the result of b base on Figure 3, 4.

Case B2 Right Turn from Minor Road