**Scenario:**An old 6-lane (3 lanes in each direction) rural freeway segment consists of lanes that are 11 feet wide. The freeway has frequent roadside obstructions located 10 feet from the right edge of the pavement. We need to determine the estimated Free Flow Speed (FFS) in miles per hour (mph) for the 3 northbound lanes. Please provide the answer to the nearest tenth.**Response Feedback:**The Base Free Flow Speed (BFFS) of 75.4 mph is adjusted by -1.9 mph due to the 11-foot lanes.**Explanation:**The calculation focuses on adjusting the base speed to account for lane width. A narrower lane size of 11 feet as opposed to a standard lane affects the usual free flow speed. The adjustment of -1.9 mph reflects this consideration, suggesting a decrease from the base speed owing to possible constraints perceived by drivers caused by lane width.**Note:** Understanding these adjustments is critical for traffic engineering and road safety planning, ensuring speed limits reflect roadway conditions and enhance safety.

A 6-lane road with 3 lanes in each direction Basic free flow speed, BFFS = 75.4 mph Width of lanes =…

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. Response Feedback: The BFFS of 75.4 mph is adjusted by 1.9 mph for the 11 ft lanes.

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. Response Feedback: The BFFS of 75.4 mph is adjusted by 1.9 mph for the 11 ft lanes.

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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Concept explainers

Intersection Design

An intersection is a location where two or more roads or railways meet or join. The traffic movement is controlled at the intersection that depends on its design and type. It governs the operation, efficiency, speed, capacity, and safety of the highways, airways, and railways. The movement of the pedestrian causes hazards and delays at the intersection.

Question

**Scenario:**
An old 6-lane (3 lanes in each direction) rural freeway segment consists of lanes that are 11 feet wide. The freeway has frequent roadside obstructions located 10 feet from the right edge of the pavement. We need to determine the estimated Free Flow Speed (FFS) in miles per hour (mph) for the 3 northbound lanes. Please provide the answer to the nearest tenth.

**Response Feedback:**
The Base Free Flow Speed (BFFS) of 75.4 mph is adjusted by -1.9 mph due to the 11-foot lanes.

**Explanation:**
The calculation focuses on adjusting the base speed to account for lane width. A narrower lane size of 11 feet as opposed to a standard lane affects the usual free flow speed. The adjustment of -1.9 mph reflects this consideration, suggesting a decrease from the base speed owing to possible constraints perceived by drivers caused by lane width.

**Note:**
Understanding these adjustments is critical for traffic engineering and road safety planning, ensuring speed limits reflect roadway conditions and enhance safety.

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The 4 northbound lanes of a rural freeway segment have 13 ft lane widths. There is no lateral clearance afforded on either side of the road. There are no ramps within the area of influence. What is the estimated FFS (mph)? Provide your answer to the nearest tenths.
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