Assessing segment- and corridor-based travel-time reliability on urban freeways : final report.

Dong, Jing; Lu, Chaoru; Liu, Chenhui; Hawkins, Neal R.; Iowa State University. Center for Transportation Research and Education; Iowa State University. Institute for Transportation

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Assessing segment- and corridor-based travel-time reliability on urban freeways : final report.

2016-09-01
By Dong, Jing ; Lu, Chaoru ; Liu, Chenhui ; ...

[PDF-2.78 MB]

English

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Details:

Creators:

Dong, Jing ; Lu, Chaoru ; Liu, Chenhui ; Hawkins, Neal R.

Dong, Jing ; Lu, Chaoru ; Liu, Chenhui ; Hawkins, Neal R. Less -
Corporate Creators:

Iowa State University. Center for Transportation Research and Education ; Iowa State University. Institute for Transportation

Iowa State University. Center for Transportation Research and Education ; Iowa State University. Institute for Transportation Less -
Corporate Contributors:

United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology ; Midwest Transportation Center

United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology ; Midwest Transportation Center Less -
Subject/TRT Terms:

[+]

Estimating Forecasting Freeway Operations Freeways Highway Corridors Performance Measures Probe Vehicles Reliability Simulation Travel-time Distribution Travel-time Reliability Travel Time Urban Highways Vissim Simulation Weather Conditions
Resource Type:

Tech Report
Geographical Coverage:

United States ; Iowa

United States ; Iowa Less -
Edition:

Final report
Corporate Publisher:

Iowa State University. Institute for Transportation ; Iowa State University. Center for Transportation Research and Education

Iowa State University. Institute for Transportation ; Iowa State University. Center for Transportation Research and Education Less -
Abstract:

Travel time and its reliability are intuitive performance measures for freeway traffic operations. The objective of this project was to quantify segment-based and corridor-based travel time reliability measures on urban freeways. To achieve this objective, a travel-time estimation model and a travel-time reliability prediction framework were developed. The proposed travel-time estimation model considers spatially correlated traffic conditions. Segment-level and corridor-level travel-time distributions were estimated using travel time estimates and compared with estimates based on probe vehicle data. Corridor-level travel-time reliability measures were extracted from travel-time distributions. The proposed travel-time estimation model can well capture the temporal pattern of travel time and its distribution. For the corridor-level travel-time reliability prediction framework, travel time observations are classified based on weather conditions, segment travel-time distributions are estimated, and segment travel-time distributions are synthesized to corridor travel-time distributions. The segment travel-time distribution estimation model was found to capture the pattern of actual travel-time distributions and could adequately represent the short-term corridor-level travel-time distributions. The proposed travel-time reliability prediction framework provides a systematic way to estimate real-time and near-future corridor travel-time reliability by considering weather impact. A Vissim simulation calibrated to Iowa compared travel-time distribution based on simulated data to that based on probe vehicle data. The simulated travel-time distribution is similar to the travel-time distribution based on probe data.
Format:

PDF
Funding:

Part of DTRT13-G-UTC37
Collection(s):

US Transportation Collection
Main Document Checksum:

[+]

urn:sha256:51d069f4bdd148f5946c2b6d467ae4f058e2d664ca226044148d58cc9efffe5d
Download URL:

https://staging-dot.cdc.gov/view/dot/31352/dot_31352_DS1.pdf
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Assessing segment- and corridor-based travel-time reliability on urban freeways : final report.

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