Details:

Creators:
Ullman, Gerald L. ; Lomax, Timothy J. ; Ye, Fan ; Scriba, Tracy
Ullman, Gerald L. ; Lomax, Timothy J. ; Ye, Fan ; Scriba, Tracy Less -
Corporate Creators:
Texas Transportation Institute
Subject/TRT Terms:
[+]
Mobility Performance Measurement Pilot Studies Probe Vehicles Traffic Delay Traffic Queuing Work Zones Work Zone Safety
Publication/ Report Number:
FHWA-HOP-11-022
Resource Type:
Tech Report
Geographical Coverage:
United States
Corporate Publisher:
United States. Federal Highway Administration
NTL Classification:
NTL-SAFETY AND SECURITY-Highway Safety;NTL-SAFETY AND SECURITY-Human Factors;NTL-HIGHWAY/ROAD TRANSPORTATION-HIGHWAY/ROAD TRANSPORTATION;
Abstract:
Currently, a well-defined and validated set of metrics to use in monitoring work zone performance do not

exist. This pilot test was conducted to assist state DOTs in identifying what work zone performance

measures can and should be targeted, what data they will need to collect to compute those measures, and

what methods exist to obtain that data. Work zone activity and traffic data from five work zone projects

were gathered and analyzed. Multiple data sources and collection methods were examined and utilized to the

extent available at each project. These sources were field crew personnel manually documenting queue

presence, length, and duration; traffic surveillance data from a transportation management center or from

portable work zone ITS; and third-party probe vehicle data (in this test, large truck speed data obtained via

the FHWA Office of Freight Management).

The results of the pilot test indicate that manual documentation of queuing by field personnel, and the use of

permanent or portable traffic sensor data can be used effectively to measure work zone impacts, given that

information as to the time and location of work activities is known. Probe vehicle data is also believed to be

a viable source of data, but sample size issues did limit is applicability in this pilot test. Average and

maximum queue lengths and duration, duration of queues exceeding pre-determined thresholds, vehicle

exposure to queues, and vehicle delays when queues are present were among the several performance

measures tested and demonstrated as viable indicators of work zone mobility impacts. A number of lessons

learned through this pilot test effort are also included in the report. A primer on how to select and compute

work zone performance measures is being developed based on the findings documented in this report.


Format:
PDF
Funding:
DTFH61-06-D-00007
Collection(s):
Federal Highway Administration US Transportation Collection
Main Document Checksum:
[+]
urn:sha256:265df74dc0aa7308c63bfbf5613e23ce870624f778e3861cdcf7aae31a89a3de
Download URL:
https://rosap.ntl.bts.gov/view/dot/26030/dot_26030_DS1.pdf
File Type:

Supporting Files

• No Additional Files

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