ramps within 3 miles upstream and downstream ofthe segment midpoint. It is on rolling terrain with10% heavy vehicles and is operating at capacity witha peak-hour factor of 0.9. If the road is expanded tofour 11-foot lanes with a 2-foot right shoulder, andtraffic after the expansion is projected to increase by10% with the same heavy vehicle percentage andpeak-hour factor, what is the new LOS andestimated density?P-22 Chapter 6Problemshour. What would be the LOS before and after theheavy vehicles are allowed on the upgrade(assuming 50% SUTs and 50% TTs.)?6.21 A multilane highway has four lanes (two lanesin each direction) and a measured FFS of 55 mi/h.The directional peak-hour volume is 1900 vehicles(the peak-hour factor is 0.80). One upgrade is 5%and is 0.62 mi long. Currently, heavy vehicles arenot permitted on the highway, but local authoritiesare considering allowing heavy vehicles on thisupgrade. If this is done, they estimate that 150heavy vehicles will use the highway during the peakconsists of cars and some percentage of heavyvehicles. The peak-hour factor is 0.85. If heavyvehicles were banned from the highway and car

N=4 lanesFFS= 55 mi/hPHF=0.8PHV= 1900 vehupfrade=55%SUT (50%) and TT (50%) No. of trucks…

6.21 A multilane highway has four lanes (two lanes in each direction) and a measured FFS of 55 mi/h. The directional peak-hour volume is 1900 vehicles (the peak-hour factor is 0.80). One upgrade is 5% and is 0.62 mi long. Currently, heavy vehicles are not permitted on the highway, but local authorities are considering allowing heavy vehicles on this upgrade. If this is done, they estimate that 150 heavy vehicles will use the highway during the peak

6.21 A multilane highway has four lanes (two lanes in each direction) and a measured FFS of 55 mi/h. The directional peak-hour volume is 1900 vehicles (the peak-hour factor is 0.80). One upgrade is 5% and is 0.62 mi long. Currently, heavy vehicles are not permitted on the highway, but local authorities are considering allowing heavy vehicles on this upgrade. If this is done, they estimate that 150 heavy vehicles will use the highway during the peak

Traffic and Highway Engineering

5th Edition

ISBN:9781305156241

Author:Garber, Nicholas J.

Publisher:Garber, Nicholas J.

Chapter8: Intersection Control

Section: Chapter Questions

Problem 8P

See similar textbooks

Similar questions

A Class II two-lane highway needs to be redesigned for an area with rolling terrain. During the peak hour, 380 vehicles are traveling in the analysis direction and 300 vehicles are traveling in the opposing direction. The PHF is 0.92. The traffic stream includes 8% large trucks, 2% buses, and no recreational vehicles. What is the maximum percentage of no-passing zones that can be built into the design with LOS maintained?
Yawi Freeway is a four lane road located in the Metro where trucks, buses, and rvs can be found aside from passenger cars. At some point further along the roadway there is a 5.7% upgrade that is 1.5 km long. If the traffic stream has 25% large trucks and buses and 5% recreational vehicles, what is the heavy vehicle adjustment factor?
The AADT for certain road sections is 25,000 vehicles/day. If the route is classified as an urban radial highway, what is the expected directional design hour volume range?
What is the capacity of a freeway with 2-lanes in one direction, 10 ft lanes, 1 ft shoulders and 4 ramps within a six-mile stretch? Show Work Correct Answer: 2335
A new 50 km freeway was required to constructed between two cities with design speed 70 mph, the expected 20 year DHV was 12000 vph on a regular weekday, rolling terrain, PHF pf 0.95, directional split of 65%, a heavy vehicle adjustment factor of 0.85 and the suggested L.O.S to reach end design period is B (v/c=0.54), if the one lane cost per kilometer was 25000$. What will be the saving of money if the operating L.O.S at the end of design period change to be L.O.S C (c/v=0.77)?Assume: the lane and shoulder width are ideal, lane capacity * 2000 pc/hr
A proposed highway is to be designed with adequate shoulder and clearance ina level terrain with the following: AADT = 25,000 pcu/day D% = 65% K = 9% Estimatethe number of lanes that will provide LOS C. SHOW COMPLETE SOLUTION
Civil Analysis of highway section A portion of a four-lane multilane highway with a full median carries 2,600 vehicles per hour during peak hours in the busiest direction. In the traffic flow, there are 2% RVs and 14% trucks. The facility's regular users are mainly motorists. The segment under study is a mile-long, 3% sustained gradient. PHF equals 0.88. Field research has been done to establish that the facility's free-flow speed is 55.0 miles per hour. What degree of service will be provided during peak hours at this facility?
An old 6-lane (3 lanes each direction) rural freeway segment has 11 ft lanes and frequent roadside obstructions located 10 ft from the right edge of the pavement. What is the estimated FFS (mph) for the 3 northbound lanes? Provide the answer to the nearest tenths.
A new section of a freeway is to be designed with a free-flow-speed of 65 mph along of 0.75 mile on 5% upgrade. The expected traffic volume is 4200 v/hr. The traffic composition is 15% trucks, 5% recreational vehicles, and 10% buses. The peak hourly factor is 0.9, the unfamiliar driver factor is 0.95. If the design requirement is to target a level of service (B), how many lanes must be provided to satisfy the design requirement?
A proposed highway is to be designed with adequate shoulder and clearance in a level terrain with the following: AADT = 25,000 pcu/day D% = 65% K = 9%. Estimate the number of lanes that will provide LOS C.
A new 4-mile long elevated roadway is constructed to give a direct traffic route from a major residential area over a swamp area to the industrial complex of a city. At present, those traveling from the residential area must take a 15-mile circuitous route either to the north or to the south of the swamp area. The travel time and cost is about the same for both. There are currently 3,000 vehicles on the north route and 4,000 on the south route on a daily basis. The new roadway is designed for a 30-year service-life and be tolled, which involves $40 million for construction and an additional $150,000 per year for toll collection. The toll rate is set at 60 cents per vehicle. Upon opening to traffic, the new roadway is expected to carry 20,000 vehicles per day. Those using the new roadway will drive an average of 2 miles to get to the entrance. Road maintenance costs in the county average $20,000 per mile per year. If vehicle operating costs average 14 cents per mile and the highway…
What is the service flow rate (pcphpl) for a freeway segment that has a free flow speed of 55 mph if a LOS B is to be maintained? Provide your answer to the nearest integer.