What is the required sight distance in the following cases: a.) You decide to overtake another vehicle in a two-lane highway. Assume the design speed is 40 MPH. b.) You make the decision to change direction on an urban road. Assume the design speed is 40 MPH. c.) Discuss the difference between (a) and (b).
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- Consider the following data: Design speed = 96 kmph Speed of overtaken vehicle = 80 kmph Reaction time for overtaking = 2 sec Acceleration = 2.5 kmph/sec The safe overtaking sight distance on a two-way traffic road way be nearlyOne vehicle is following another on a two-lane, two-way highway at night according to the safe-driving “rule-of-thumb” of one car length spacing for each 10 mph of speed. Both of you traveling at 70 mph when the lead vehicle crashes into an unlighted disable vehicle. Assuming that one car length is 20 feet, f=0.28 and PIEV time is 1.5 for you, will you hit the lead vehicle? If so at what speed will you be going?2 please :)
- Please help:)Based on the count data shown below, is a traffic signal justified under warrant 1 or warrant 2? The major road is in the E-W direction and minor road is in the N-S direction. Assume there are two lanes on all approaches and the major road speed limit is 35 mph. Hour Beginning 7 AM 8 AM 9 AM 10 AM 11 AM 12 PM 1 PM 2 PM 3 PM 4 PM 5 PM 6 PM SB Approach 321 289 161 139 167 281 256 226 204 239 243 227 Mean volume counts, each hour EB Approach 403 366 284 304 354 413 397 433 340 440 517 423 WB Approach 168 189 137 167 223 301 284 306 258 322 393 355The design speed of a multilane highway is 65 mi/h. Determine the following. Note: The term a g in the appropriate equation is typically rounded to 0.35 in calculations. Assume perception reaction time = 2.5 sec. (a) the minimum stopping sight distance (in ft) that should be provided for a level roadway Your response differs from the correct answer by more than 10%. Double check your calculations. ft (b) the minimum stopping sight distance (in ft) that should be provided for a roadway with a maximum grade of 3 percent. Your response differs from the correct answer by more than 10%. Double check your calculations. ft
- 2.30 An engineering student is driving on a level roadway and sees a construction sign 500 ft ahead in the middle of the roadway. The student strikes the sign at a speed of 25 mi/h. If the student was traveling at 55 mi/h when the sign was first spotted, what was the student's associated perception/reaction time (use practical stopping distance)?For a vehicle travelling at 85km/hr determine the stopping sight distance required by the driver to avoid a broken-down vehicle in the middle of the road assuming perception reaction time is 2secs and rate of deceleration is 0.25 times gravity.A driver with 20/20 vision traveling at 55 mph in the median lane desires to exit the freeway at the exit ramp. If 5-in. letters are used, what is the minimum distance the sign should be placed ahead of the ramp exit? (Some assumptions that would be helpful are perception-reaction time = 2 sec; exit speed = 30 mph; deceleration rate = 4.80 ft/s2 a driver with 20/20 vision can read a sign at 55 ft per inch of letter height.) Discuss your results.
- Compute the intermediate sight distance for a freeway with a design speed of 80 kph if the perception time is assumed to be 2.5 seconds with a skid resistance of 0.70. Assume brake efficiency to be 60%.. A driver traveling at 60 mph rounds a curve on a level grade to see a truck overturned across a roadway at a distance of 400 ft. Is the vehicle able to avoid hitting the truck? If not, how fast is the vehicle traveling when it strikes the truck? Assume typical reaction time and rate of deceleration. (Be sure to consider if you should apply stopping sight distance or decision sight distance.)Consider two cars approaching from the opposite directions at 90 km/h and 60 km/h. If the reaction time is 2.5 s, coefficient of friction is 0.7 and brake efficiency is 50% in both the cases, the minimum sight distance required to avoid a head-on collision will be nearly?