A driver with 20/40 vision needs 2 sec to read a sign posted on a freeway. A person with 20/20 vision can read this sign at a distance of 225 ft. Do you feel that the driver has suffi- cient time to read this sign driving at a speed of 55 mph? At what speed would he have to travel just io be able to read the sign? Discuss this problem.

6. JA driver with 20/20 vision traveling at 55 mph in the median lane desires to exit the free- way 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 20/20 vision can read a sign at 55 ft per inch of letter height.) Discuss your results. 4.80 ft/s 2; a driver with

What is the intersection sight distance (ft) needed at a yield controlled intersection for a passenger car to turn right onto a 2-way, 2-lane road with a design speed of 50 mph? [round to the nearest foot] Response Feedback: ISD=1.47V major g

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 168 189 137 167 223 301 284 306 258 322 393 355

5. An engineering student is driving on a roadway with a -1% grade and sees a traffic barricade 600 ft ahead in the middle of the roadway. Despite his best effort to stop in time, the student strikes the sign at a speed of 40 mi/hr. If the student was traveling at 70 mi/hr when the sign was first spotted, what was the student's associated perception-reaction time (use practical stopping distance). 6. A driver is traveling at 62 mi/hr on a wet road. An object is spotted on the road 600 ft ahead and the driver is able to come to a complete stop just before hitting the object. Assuming perception-reaction time of 2.5 seconds and practical stopping distance, determine the grade of the road.

this is one question split by parts a and b

In a school zone, the posted speed limit is 15 mph. A police officer used a laser gun to record the spot speeds of 6 vehicles during the 15-mph enforcement hour. The recorded speeds are 15, 15, 15, 15, 20, 15 mph. Calculate the time-mean-speed and the space-mean-speed to two decimal places.

Solve it accurate.

On a six-lane EDSA, an observer is stationed at a certain spot. All of the cars in lane 1 are moving at a speed of 80 kph, 75 kph in lane 2, and 90 kph in lane 3,66 kph in lane 4,70 in lane 5, 65 in lane 6 and 85 for the bus lane respectively. In addition, cars are kept at a constant 65-meter distance between. What will be the time-mean speed and space-mean speed for such a traffic stream based on the acquired spot speed data for all cars as they cross the observation site for 60 minutes?

The length of a highway is 550 m when a head-on vehicle collision occurred. Police reports show that neither human error nor vehicle malfunction was the cause of the collision. Check if the length of the highway is sufficient for an overtaking maneuver. *Accident Report: Speed of Overtaking Car = 96 kph, Speed of Overtaken Car = 88 kph, Perception-reaction Time = 2.5 sec, Average acceleration = 2.4 m/sec2, Time of the passing vehicle occupying the left lane = 10.4 sec, Distance between the passing vehicle at the end of its maneuver and the opposing vehicle = 84m.