What is the minimum stopping sight distance on a -3.5% grade for a design speed of 110 kmph ? (Consider friction coefficient f = 0.28, t = 2.5 sec and G = 0.035)
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- What is the minimum stopping sight distance on a -3.5% grade for a design speed of 110 kmph ? (Consider friction coefficient f = 0.28, t = 2.5 sec and G = 0.035)d) Determine the safe stopping sight distance while traveling at speed of 60 kmph. Assuming perception and brake reaction time is 2.5 sec. and coefficient of friction varying from 0.40 at 20 kmph to 0.35 at 100 kmph. Case: 1. level Ground 2. Upward gradient of 3%For the through movement of the north-bound approach, what is the minimum change and clearance interval (CCL)? Assume a travel speed of 45 mph. Geometric layout is shown in the figure below. Mind you - - that approach is located along a +3% upgrade. Let's consider a semi truck as our design vehicle, which has a vehicle length of 72 ft! a. 3.3 sec b. 4.7 sec C. 5.5 sec d. 7.8 sec JINI 60 ft. 48 ft. TINI North-bound G=+3%
- Determine the length required for the exit ramp having a downward slope of 2% and with the following information: Expressway Speed = 96 kph Exit sign letter height = 3 in Exit sign is located 80 m. from exit ramp. Motorist can see 1 in. of letter height at 50 ft. Perception-Reaction Time = 2.5 sec Friction = 0.35 %3DFind minimum sight distance to avoid head-on collision of two cars approaching at 90 kmph and 60kmph. Given t=2.5sec, f=0.7.Homework Q1: A driver of a vehicle traveling at 90 kph up-grade requires 96m to sto after he applied the brakes, less than another driver traveling at the same speed down the ame grade, if the coefficient of longitudinal friction is 0.3. What is the percent grade of thatsection and what is the total stopping sight distance on the down grade? Q2: In the figure shown below, its required to calculate the minimum distane (D) for placing the right turn sign to enable a driver on the major road (A) to turn his vehicl into minor road (B)?
- 3. A building is located 8.8 m from the centerline of the inside lane of a curved section of highway whose radius is 145 m. the road is level and e is equal to 0.10. Determine the maximum possible design speed. Assume the longitudinal and lateral coefficients of friction are equal to 0.35 and 0.13, respectively. Ensure you check speed for both stopping sight distance and vehicle stability. Assume a standard perception-reaction time of 2.5sec.What is the calculated stopping sight distance (ft) for a -3% grade when the design speed is 55 mph, assuming the AASHTO recommended deceleration rate and perception-reaction time. Response Feedback: S=v²/[30(a/32.2+G)] + 1.47VtrA vehicle moving in wet weather along down grade highway of (- 4%) grade. The design speed (48mile/hr.), (f = 0.30), (t = 2.50 Sec.). The stopping sight distance you %3D %3D recommended is equal to:
- Determine the minimum stopping sight distance on a -3.5% grade for a design speed of 110 kph. Coefficient of friction between tires and pavement is 0.28. Driver’s reaction time (including perception time) is 2.5 sec.4. A tall building is located 60 ft from the centerline of the right lane of a local road and 40 ft from the centerline of the right lane of an intersecting lane. The maximum speed at the intersecting road is 60 mph. Assume level grade. a. What should be the speed limit on the local road such that the minimum sight distance is provided to avoid any imminent collisions? b. If the minimum distance is not available, what would be your recommendation for safe operation? Table 1: Suggested lengths of Sight-Triangle for Right-turn cases Design Speed (mi/h) 15 20 25 30 35 40 45 50 55 60 65 70 75 80 Length of Leg (ft) 70 90 115 140 165 195 220 245 285 325 365 405 445 485ht 2. The stopping sight distance of a vehicle moving with 45kmph and having a coefficient of friction as 0.4 is? a) 48m b) 49m c) 50m d) 51m