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Civl 340 - Review-2023

The document summarizes key topics in transportation engineering including traffic flow theory, freeway and intersection capacity analysis, and traffic safety. It discusses traffic flow parameters, macroscopic and microscopic traffic flow models, shock waves, freeway components and capacity, weaving sections, two-lane highway capacity, intersection control types and design, and traffic safety improvement programs. The review covers analysis of basic freeway sections, weaving sections, ramp junctions, signal control types, and techniques for identifying accident prone locations.

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91 views27 pages

Civl 340 - Review-2023

The document summarizes key topics in transportation engineering including traffic flow theory, freeway and intersection capacity analysis, and traffic safety. It discusses traffic flow parameters, macroscopic and microscopic traffic flow models, shock waves, freeway components and capacity, weaving sections, two-lane highway capacity, intersection control types and design, and traffic safety improvement programs. The review covers analysis of basic freeway sections, weaving sections, ramp junctions, signal control types, and techniques for identifying accident prone locations.

Uploaded by

justinkarlpolicarpio
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as PDF, TXT or read online on Scribd
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CIVL 340

TRANSPORTATION ENGINEERING I

REVIEW

• The Vehicle

• The Driver

• Traffic Flow Theory

• Geometric Design of Highways

• Freeway Capacity Analysis

• Basic Segments, Weaving Sections, Ramp Junctions

• Two Lane Highway Capacity

• Intersection Control and Design

• Traffic Safety
TRAFFIC FLOW THEORY

• Traffic Flow Parameters

• Speed, Flow, Density, Occupancy, Spacing, and Headway


• q=kv

• Macroscopic Models of Traffic Flow

vf
Greenshields v = vf − ( )k
kj

Greenberg k = k j e− v / v m

• Shock waves

• Microscopic Models of Traffic Flow

• General Motors’ Theories


response = func(sensitivity, stimuli)
FREEWAY CAPACITY ANALYSIS

• Freeway Components:

Basic Freeway Sections

Weaving Sections

Ramp Junctions

• Freeway Capacity: is the maximum 15-minute rate of flow that can be


accommodated by a uniform freeway segment under prevailing traffic
and roadway conditions.
Basic Freeway Segments

• Ideal Conditions for Capacity Analysis


• 12ft lanes, 6 ft lateral clearance, passenger cars, typical
weekday commuters in urban area
Weaving Sections

• Weaving Configuration Types


TWO LANE HIGHWAY CAPACITY
Intersection Control and Design

• Types of Intersection Control

• Types of Signal Control

• Clearance Time and The Dilemma Zone

• Minimum Cycle Length for Pedestrian Crossing

• Signal Coordination (Offsets)

• Fully Actuated Signals (Min G, Max G, Green extension)

• Webster’s Method

• Random Vehicle Arrival


• Saturation Flow and Lost Time
Traffic Safety

• Importance of Reducing Accident Costs

• Highway Safety Improvement Programs (HSIPs)

• Accident Prone Locations

• Accident Frequency, Rate and Severity


• Accident Critical Rates
• Rate Quality Control Technique

• Assigning Values to Accidents

• Human Capital Cost


• Willingness to Pay
CWL 340- Final Examination
April1999 PageS

Marks Traffic Safety and ITS

(10) The average accident rate for urban 4-way STOP controlled intersections in the City of Vancouver
is 0,6 acc/mev. You are analyzing two urban 4-way STOP controlled intersections in Vancouver
with the following characteristics:

No. of Accidents/3 years Total Entering Vehicles


Intersection A 10 8,000
Intersection B 12 11,000

- Determine whether these intersections are accident prone.

(6) Briefly discuss the benefits anticipated from using ITS technologies.

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