A basic freeway segment is located in an urban area and has three lanes in each direction. The traffic counts indicate the traffic volume of 4500 vehicles during the analysis hour, with the highest 15-minute volume of 1250 vehicles. The freeway section has a 2% grade, which is 0.375 miles long. The traffic stream includes about 15% heavy vehicles, consisting of about 50% single-unit trucks and buses, and 50% tractor-trailers. The average vehicle speed under the described traffic conditions is 60 mph. Calculate the analysis flow rate (in pc/h/In) and determine level of service (LOS) for the given traffic conditions. (Write the answer for the LOS in the box below).

A basic freeway segment is located in an urban area and has three lanes in each direction. The traffic counts indicate the traffic volume of 4500 vehicles during the analysis hour, with the highest 15-minute volume of 1250 vehicles. The freeway section has a 2% grade, which is 0.375 miles long. The traffic stream includes about 15% heavy vehicles, consisting of about 50% single-unit trucks and buses, and 50% tractor-trailers. The average vehicle speed under the described traffic conditions is 60 mph. Calculate the analysis flow rate (in pc/h/In) and determine level of service (LOS) for the given traffic conditions. (Write the answer for the LOS in the box below).

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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A four-lane basic freeway segment on level terrain is being redesigned. The current roadway has 12 ft lanes with 4 ft shoulders. The proposed alignment would expand to six 11-ft lanes with 2 ft shoulders. The road carries 3000 vehicles in the peak hour in one direction, with 925 coming in the peak 15 minutes. The truck mix is 70/30 and makes up 10% of traffic. What is the density and LOS (level of service) before and after the proposed change?
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