This preview shows page 1. Sign up to view the full content.
Unformatted text preview: factor of 0.80, a rolling terrain, 10-ft lanes, a 60 mph design speed, and adequate lateral clearances, determine the minimum number of lanes needed to provide for this. QUESTION 3 A six-lane urban freeway (three lanes in each direction) is on rolling terrain with a 70-mph design speed, 10-ft lanes, with obstructions 2 ft from pavement edge at median and roadside. A directional peak-hour volume of 1800 vehicles is observed with 550 vehicles arriving in the most congested 15-min period. If the traffic stream has 10 percent trucks, 8 percent buses and no recreational vehicles, determine (a) the level of service (b) how many additional vehicles can be added to the peak hour before the freeway reaches capacity....
View Full Document
- Spring '10
- Transportation Engineering