01126910

Component

https://doi.org/10.3141/2107-05

http://scholar.google.com...ibby&publication_year=2009

Speed monitoring displays (i.e., speed trailers) have been evaluated in many states for reducing vehicular speeds in work zones. This study evaluated the enhancements to speed trailers regarding message size, the use of flashing, and the presence of more than one speed trailer in work zones. Field tests were conducted at two sites in the Las Vegas, Nevada, area, and traffic data were collected for statistical analysis. Regression models were developed to estimate the speeding likelihood and vehicle speeds on the basis of the free-flow speed data. The results indicated that the size of displayed messages and the use of flashing did show significant impact on speeding likelihood and speed reduction for vehicles in work zones. The extent of the impact varied for vehicle classification, the lanes they were operating in, and the day or night in which they were deployed. This study recommended larger message size and the use of flashing signs for speed trailers. More than one speed trailer was recommended for additional speed reduction.

01142391

09-1742

English

pp 46-56

2009

Transportation Research Record: Journal of the Transportation Research Board

9780309126236

Print

Figures (5) ; Photos (4) ; References (9) ; Tables (4)

Messages (Communications); Regression analysis; Size; Speed control; Speeding; Traffic data; Traffic speed; Work zone safety; Work zone traffic control

Speed display signs

Flashing messages

Las Vegas (Nevada)

Highways; Maintenance and Preservation; Operations and Traffic Management; I60: Maintenance; I73: Traffic Control

TRIS, TRB, ATRI

Jan 30 2009 6:00PM

• Benefit–Cost Analysis of Maintenance Decision Support System
• Benefits of Pavement Markings: A Renewed Perspective Based on Recent and Ongoing Research
• Computer-Aided Design of Passive Snow Control Measures
• Downstream Effects of Speed Photo–Radar Enforcement and Other Speed Reduction Treatments on Work Zones
• Evaluation of Effects of Weather Information on Winter Maintenance Costs
• Exploratory Analysis of Accelerated Wear Testing to Evaluate Performance of Pavement Markings
• How Drivers Perceive Visibility in Blowing Snow: Human Subject Experiments on Visibility—Viewing Videos of Blowing Snow
• Multilevel Assessment of the Impact of Rain on Drivers’ Behavior: Standardized Methodology and Empirical Analysis
• Nighttime Visibility of Prototype Work Zone Markings Under Dry, Wet-Recovery, and Rain Conditions
• Precipitation Variation and the Identification of High-Risk Wet Accident Locations in California
• QuickZone Improvement for Rural Freeway and Model Validation
• Revised Process for Work Zone Decision Making Based on Quantitative Performance Measures
• Strategy Implementation by State Transportation Agencies to Maintain Work Zone Mobility and Safety
• Thermoplastic Inlay Pavement Markings: Field Performance and Effect on Hot-Mix Asphalt