Traffic and Highway Engineering
5th Edition
ISBN: 9781305156241
Author: Garber, Nicholas J.
Publisher: Cengage Learning
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Chapter 7, Problem 13P
To determine
The width of the turning roadwayfor a two-lane operation with barrier curbs on both sides.
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3. A developer has applied for a construction permit for a building at the southeast corner of an
intersection. The intersection is controlled with a stop sign on the minor road. The four-lane
major road in the east-west direction has a design speed of 50 mph. The two-lane minor road
is controlled by a stop sign. Determine whether the permit should be approved for the
following conditions.
a. Design vehicle - Single-Unit truck
b. Approach grade = 4%
C. Maximum feasible distance of the building from the center of the nearest lane of the
four-lane road = 21 ft
d. Maximum feasible distance of the building from the center of the nearest lane of the
two-lane road = 15 ft
1. Two low-volume two-lane streets (lane width = 11 ft) intersect in an urban residential area at 120-60
degree-angle. Recommend appropriate curb configurations for this intersection based on AASHTO
(2011) recommendations for a passenger car design vehicle. Draw a neat sketch for the intersection
showing the dimensions of all elements you selected in your design.
As SR361 enters Middletown from the NW, it must curve to the south between two historic buildings. At this point, SR361 consists of two 11-foot lane. The building to the right of traffic, is only 10 feet from the edge of the 5-foot wide shoulder. Local policy is that the superelevation rates not exceed 0.06 inches per inch. Will the minimum SSD be available from vehicles moving at 60 mph through this curve?
Chapter 7 Solutions
Traffic and Highway Engineering
Ch. 7 - Prob. 1PCh. 7 - Prob. 2PCh. 7 - Prob. 3PCh. 7 - Prob. 4PCh. 7 - Prob. 5PCh. 7 - Prob. 6PCh. 7 - Prob. 7PCh. 7 - Prob. 8PCh. 7 - Prob. 9PCh. 7 - Prob. 10P
Ch. 7 - Prob. 11PCh. 7 - Prob. 12PCh. 7 - Prob. 13PCh. 7 - Prob. 14PCh. 7 - Prob. 15PCh. 7 - Prob. 16PCh. 7 - Prob. 17PCh. 7 - Prob. 18PCh. 7 - Prob. 19PCh. 7 - Prob. 20PCh. 7 - Prob. 21PCh. 7 - Prob. 22PCh. 7 - Prob. 23PCh. 7 - Prob. 24PCh. 7 - Prob. 25PCh. 7 - Prob. 26PCh. 7 - Prob. 27PCh. 7 - Prob. 28P
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- What super-elevation rate would you recommend for a roadway with a design speed of 110 kph and a radius of 1400 ft? Assume f=0.11.arrow_forwardDuring the peak hour on a Class Il two-lane highway in 5% grade terrain, volumes northbound are 1200 veh/h and volumes southbound are 400 veh/h. The PHF is 0.95, and there are 10% trucks/buses and 7% RVs. Lane widths are 12 ft, and shoulder widths are 4 ft. The roadway section is 5 mi in length, and there are 8 access points per mi. There are 50% no-passing zones and the base free-flow speed is 65 mi/h. Compute PTSF and ATS in both directions.arrow_forwardA rural collector is to be constructed in an area of rolling terrain where the ADT is 650 veh/day. For this situation, determine the following design values. (a) Minimum design speed (b) Recommended lane width (c) Preferable shoulder width (d) Maximum gradearrow_forward
- A six-lane freeway (three lanes in each direction) has regular weekday users and currently operates at maximum LOS C conditions. The lanes are 11 ft wide, the right-side shoulder is 4 ft wide, and there are two ramps within three miles upstream of the segment midpoint and one ramp within three miles downstream of the segment midpoint. The highway is on rolling terrain with 10% large trucks and buses (no recreational vehicles), and the peak-hour factor is 0.90. b.) Determine the adjustment factor (f). (Express in three decimals)arrow_forwardA six-lane freeway (three lanes in each direction) has regular weekday users and currently operates at maximum LOS C conditions. The lanes are 11 ft wide, the right-side shoulder is 4 ft wide, and there are two ramps within three miles upstream of the segment midpoint and one ramp within three miles downstream of the segment midpoint. The highway is on rolling terrain with 10% large trucks and buses (no recreational vehicles), and the peak-hour factor is 0.90. a.) Determine the Free Flow Speedarrow_forwardA six-lane freeway (three lanes in each direction) has regular weekday users and currently operates at maximum LOS C conditions. The lanes are 11 ft wide, the right-side shoulder is 4 ft wide, and there are two ramps within three miles upstream of the segment midpoint and one ramp within three miles downstream of the segment midpoint. The highway is on rolling terrain with 10% large trucks and buses (no recreational vehicles), and the peak-hour factor is 0.90. Determine the hourly volume for these conditions.arrow_forward
- A six-lane freeway (three lanes in each direction) has regular weekday users and currently operates at maximum LOS C conditions. The lanes are 11 ft wide, the right-side shoulder is 4 ft wide, and there are two ramps within three miles upstream of the segment midpoint and one ramp within three miles downstream of the segment midpoint. The highway is on rolling terrain with 10% large trucks and buses (no recreational vehicles), and the peak-hour factor is 0.90. c.) Determine the hourly volume for these conditions (Round off to nearestarrow_forwardA six-lane freeway (three lanes in each direction) has regular weekday users and currently operates at maximum LOS C conditions. The lanes are 3.5m wide, the right-side shoulder is 1.2 m wide, and there are two ramps within three miles upstream of the segment midpoint and one ramp within three miles downstream of the segment midpoint. The highway is on rolling terrain with 10% large trucks and buses (no recreational vehicles), and the peak-hour factor is 0.90. a) Determine the hourly volume for these conditions. b) At one point along this freeway, there is a 4% upgrade with a directional hourly traffic volume of 5000 vehicles. How long can this grade be without the freeway LOS dropping to F?arrow_forwardA four-lane freeway (2 lanes in each direction) has regular weekday users and currently operates at maximum LOS C conditions. The lanes are 12 ft wide, the right-side shoulder is 4 ft wide, and there are two ramps within three miles upstream of the segment midpoint and one ramp within three miles downstream of the segment midpoint. The highway is on rolling terrain with 10% large trucks and buses (no recreational vehicles), and the peak-hour factor is 0.90. Determine the D in pc/mi/h and vp in pc/hr/ln.arrow_forward
- A four-lane freeway with 12 ft lanes and 5 shoulders is on a 2% grade for the 1.25-mi analysis stretch. There are 2 ramps in this section. If the traffic mix is generally 6% heavy vehicles with a 70/30 SUT/TT split and a PHF of 0.8, how many vehicles can the freeway carry in the peak hour without dropping below Level of Surface (LOS) C?arrow_forwardA six-lane multilane highway (three lanes in each direction) has 10-ft lanes with 5-ft shoulders on the right side. There are 10 access points per mile and the posted speed limit is 50 mph. The median is TWLTL. Estimate the free flow speed.arrow_forwardA two-lane national highway passing through rolling terrain has horizontal curve of 450 m radius. Assuming design speed of 90 kmph, pavement width of 7 m, with a wheel base of 6.1 m, determine extra width of the pavement required for this curve. Assume other parameters as per relevant IRC recommendations.arrow_forward
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