Two cars are approaching each other from the opposite direction. Both cars are traveling the same grade of 4%. The speed of the car running uphill is 40mph and the other running at 60mph. If reaction time for both drivers is 3.5 sec and friction is 0.5, compute the maximum distance required to avoid collision.
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- A driver traveling at 50 mph sees a wall at a certain distance ahead. The driver applies the brakes immediately upon perception and begins slowing down at 6 m/s. If the distance from the stopping point to the wall is 12m, how far was the car from the wall upon perception if reaction time is 3 sec.? what is the coefficient of friction?12. The stopping sight distance of a vehicle is 295 meters. Given that the acceleration of the vehicle is 3.45 m/s2 and travelling at a maximum grade of -3.5%, determine the following: a. Velocity of the vehicle in miles per hour. ; b. Reaction distance in yards.2/97 Determine the maximum speed for each car if the normal acceleration is limited to 0.88g. The roadway is unbanked and level. 21 m fo 16 m Problem 2/97
- A cargo truck of J&T is to driven up a 5% grade at 120kph. The coefficient of road adhesion is 0.9 and its known that the braking efficiency is 85%. Determine the theoretical stopping distance if the driver has a reaction time of 0.7sec and the rolling resistance is 0.0137?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.Q2/ A track traveling at 25mph is approaching a stop sign. At time to and a distance of 60 ft the track begins to slow down by decelerating at 14 ft/sec? .do you think the track be able to stop in time.
- A driver of a car applied the brakes and barely avoided hitting an obstacle on the roadway. The vehicle left skid marks of 26 m. (Assume f-0.6) determine whether the driver was in violation of the 70 km/hr speed limit at the location if he was travelling : a/ uphill on a 3° incline or, b/ downhill on a 3º incline.A driver (with a reaction time 0.60 sec) is driving down hill on a 5% grade at 60 km /hr .find minimum stopping sight distance required on highway section ?assume coefficient of friction =0.7 locked wheels?Plz, solve this problem. Transportation Engineering-2 A four-lane highway (2 lanes in each direction) with 3.65m lanes has a horizontal curve designed for a 380 m centerline radius, and a 110 km/hr design speed. The grade is level. Use a driver perception reaction time of 2.5 sec and a vehicle deceleration rate of 3.4 m/sec2. Determine the closest distance any roadside object may be placed to the centerline of the inside lane of the roadway.(note: Do not round any value. Use calculated values).
- Determine the minimum stopping sight distance on a -3.5% grade for a design speed of 110kph. Coefficient of friction between tires and pavement is 0.28. Driver’s reaction time (including perception time) is 2.5 sec.The design speed of a multilane highway is 60 mi/h. What is the minimum stopping sight distance that should be provided on the road if (a) the road is level and (b) the road has a maximum grade of 4%? Assume the perception-reaction time = 2.5 sec.A 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 recommended is equal to