28. A car is traveling downhill on a suburban road with a grade of 3% at...
1. Find the stopping sight distance (in feet) for traveling downhill at a grade of 3% and speed of 60 mph, assuming driver’s perception and reaction time of 2.5 sec and a deceleration rate of 9.3 ft/s2. 2. A temporary diversion has been constructed on a highway of +3% grade due to major repairs that are being undertaken on a bridge. The maximum speed allowed on the diversion is 25 mi/h. Determine the minimum distance from the diversion that a...
1) A horizontal curve is being designed around a pond with a tangent length of 1200 ft and central angle of 0.5211 radians. If the PI is at station 145+00, determine the station of PT. ⦁ 168+45.43 ⦁ 156+45.43 ⦁ 173+94.00 ⦁ 156+72.72 2) A car is traveling downhill on a suburban road with a grade of 3% at a speed of 35 mi/h. Determine the stopping sight distance based on a reaction time of 2.5 second, and a deceleration...
While a car was operated at 60 mph on a freeway, the driver saw a box on the road ahead and tried to stop the car. The highway grade is -2%. Assume the maximum deceleration rate of the car is 11.2 ft/sec^2 and the perception-reaction time is 2.5 sec. Calculate the stopping sight distance.
Determine the sight distance leg along the railroad tracks in ft. A two lane road crosses an at grade railroad track at 90°. If the design speed of the two lane road is 50 mi/h and the velocity of the train when crossing the highway is 90 mi/h, determine the sight distance leg (in ft) along the railroad tracks to permit a vehicle traveling at the design speed to safely cross the tracks when a train is observed at a...
Stopping sight distance (SSD) is defined as the distance needed for a driver to see an object on the roadway and then stop before colliding with it. It's composed of the distance to react on first seeing the object and then the distance to stop after the brake is engaged. The following is a formula for determining stopping sight distance: ssi) = (. | c:/ + |-. SSD is the stopping sight distance (m or ft e is the conversion...
1) Calculate the safe stopping distance for a section of rural road with a design speed of 90 mi/h on a 4% upgrade? Use standard deceleration rate if 11.2 ft/sec2 a) 942.59 ft b) 1076.60 ft c) 865.15 ft d) 1139.13 ft
4 (2.52). The minimum stopping distance for a car traveling at a speed of 30 m/s is 60 m, including the distance traveled during the driver's reaction time of 0.50 s. a) What is the deceleration of the car while braking? b) What is the minimum stopping distance for the same car traveling at a speed of 40 m/s with the same reaction time and deceleration?
6. Determine the sight stopping distance (in feet) on a highway with a-2% grade if the design speed is 60 mph. Assume a perception reaction time of2 ft/s2. Answer-489.6
2. A driver is traveling at 90 mi/h down a 3% grade on good, wet pavement. An accident investigation team noted that braking skid marks started 410 ft before a parked car was hit at an estimated 45 mi/h. Ignoring air resistance, and using theoretical stopping distance, a. what was the braking efficiency of the car? b. If the car’s antilock braking system was effective (no sliding wheels on the pavement), what would the crash speed be?
A car with good tires on a dry road can decelerate at about 5.5 m/s2 when braking. Suppose a car is initially traveling at 62 mi/h. a) How much time does it take the car to stop? b) what is the stopping distance? Please show step by step!