Highway Engineering CE 431 Tutorial No 1 Eng

Highway Engineering CE 431 Tutorial No. 1 Eng. Ali Mohammed Babalghaith

Functional classification of highways

Functional classification of highways Riyadh – Dammam Road Riyadh – Qassim Road Riyadh – Mecca Road Ring Road

Functional classification of highways king Fahd Road king Abdullah Road

Functional classification of highways king Fahd Road king Abdullah Road

Functional classification of highways Ring of king Saud University Takhasusi Road Olaya Street.

Chapter 4: Highway Evaluation Highway User Cost (HU) HU = (B + A) L +T+D B= Basic Section (from figure 4 -1 ) A= Accident Costs ( given) L= Section Length ( Miles) T= Transition Cost ( from figure 4 -2 ) D = Delay at intersection (from figure 4 -3 & 4 -4)

Chapter 4: Highway Evaluation Problems page 102 in text book 4 -1 4 -2 4 -3

Problem 4 -1 ( page 102) Determine the basic section cost for passenger cars using a multilane highway under the following conditions: • Design speed = 60 mph • Average running speed = 37 mph • Grade = +2% • Volume / Capacity ratio(v/c) = 0. 7 • Level of service = C • Curvature, R = 1432 ft.

Solution 4 -1 Page 75

D Figure 4 -1 Page 75 A 27 0. 7 B C

Solution 4 -1 Page 75

D Figure 4 -1 Page 75 A B C 37 27 79 0. 7

Solution 4 -1 Page 75

D Figure 4 -1 Page 75 4 A B C 37 27 79 0. 7 8

Solution 4 -1 Page 75

D Figure 4 -1 Page 75 4 A B C 37 27 79 0. 7 8

Solution 4 -1 Page 75

Problem 4 -2 (A) Estimate the one-way section transition cost for the highway described in problem 4. 1 given that the average running speed on next section is 25 mph. (B) What would be the adjustment factor to account for the presence of 10 % single unit trucks and 5 % 3 -S 2 combination trucks?

Solution 4 -2 Page 76

Transition cost 2. 4 $/1000 passenger car Adjustment factor for truck = 1. 68 Transition cost = 1. 68 x 2. 4 = 4. 03 $ /1000 vehicles 2. 4 25

Problem 4 -3 The volume of traffic along a certain intersection approach is 600 passenger cars per hour. Determine the cost due to stopping at the intersection under the following conditions: • Saturation flow, s = 1750 vph • Signal cycle time = 60 sec • Effective green time = 30 sec • Approach speed = 35 mph • 5% single unit trucks • 10% 3 -S 2 combination trucks

Solution 4 -3

Solution 4 -3 λ = 30/60 = 0. 5 0. 69 3. 1

Solution 4 -3

Solution 4 -3 λ = 30/60 = 0. 5 0. 69 3. 1

Solution 4 -3

Solution 4 -3 λ = 30/60 = 0. 5 0. 69 3. 1 13. 5

Solution 4 -3

Solution 4 -3 λ = 30/60 = 0. 5 0. 69 3. 1 13. 5

Solution 4 -3

Solution 4 -3