Title page for ETD etd-94112239721111


Type of Document Master's Thesis
Author Turochy, Rod E.
Author's Email Address rturochy@vt.edu
URN etd-94112239721111
Title A Study of the Effectiveness of Unmanned Radar as a Speed Control Technique in Freeway Work Zones
Degree Master of Science
Department Civil Engineering
Advisory Committee
Advisor Name Title
Hobeika, Antoine G.
Sivanandan, R.
Trani, Antonio A.
Drew, Donald R. Committee Chair
Keywords
  • highway
  • radar
  • speed
  • work
  • zone
Date of Defense 1997-03-13
Availability unrestricted
Abstract
The focus of highway work is shifting from new construction further into maintenance, rehabilitation, and reconstruction of existing facilities. Work zones constitute sections of highway where these efforts are actively pursued. Excessive speed is often a contributing factor to work zone accidents. One method of speed control in work zones is the deployment of unmanned, or drone, radar transmitters, to simulate and supplement police presence in work zones.

A review of the literature and past research on speed control techniques was conducted, and data was collected in several work zones on Interstate 81 in Virginia. Traffic data were gathered both upstream and in the range of the unmanned radar units. Effectiveness of the unmanned radar was expressed as changes in mean speed, speed variance, percent of traffic exceeding the speed limit, and eighty-fifth percentile speed. Statistical analyses on the resulting speed distributions utilized hypothesis testing to determine the significance of differences in the measures of effectiveness among speed control conditions in work zones. User costs associated with work zones were also examined.

At the sites studied, significant reductions in mean speed and in percent of traffic exceeding the speed limit were observed, as were minor reductions in speed variance and eighty-fifth percentile speed. Unmanned radar was found to be particularly effective when police presence was expected by motorists. From this research effort, recommendations were developed to assist traffic engineers in determining the most effective way to use unmanned radar to maximize their safety benefit on the traffic stream.

Files
  Filename       Size       Approximate Download Time (Hours:Minutes:Seconds) 
 
 28.8 Modem   56K Modem   ISDN (64 Kb)   ISDN (128 Kb)   Higher-speed Access 
  etd.pdf 3.82 Kb 00:00:01 < 00:00:01 < 00:00:01 < 00:00:01 < 00:00:01
  fig31.pdf 203.00 Kb 00:00:56 00:00:28 00:00:25 00:00:12 00:00:01
  Figa1z.pdf 44.55 Kb 00:00:12 00:00:06 00:00:05 00:00:02 < 00:00:01
  Figa2z.pdf 34.20 Kb 00:00:09 00:00:04 00:00:04 00:00:02 < 00:00:01
  Figa3z.pdf 22.31 Kb 00:00:06 00:00:03 00:00:02 00:00:01 < 00:00:01
  Figa4z.pdf 34.55 Kb 00:00:09 00:00:04 00:00:04 00:00:02 < 00:00:01
  msback1.pdf 13.93 Kb 00:00:03 00:00:01 00:00:01 < 00:00:01 < 00:00:01
  msback2.pdf 91.94 Kb 00:00:25 00:00:13 00:00:11 00:00:05 < 00:00:01
  msbody1.pdf 104.44 Kb 00:00:29 00:00:14 00:00:13 00:00:06 < 00:00:01
  msbody1a.pdf 4.79 Kb 00:00:01 < 00:00:01 < 00:00:01 < 00:00:01 < 00:00:01
  msbody2.pdf 25.56 Kb 00:00:07 00:00:03 00:00:03 00:00:01 < 00:00:01
  msbody3.pdf 29.48 Kb 00:00:08 00:00:04 00:00:03 00:00:01 < 00:00:01
  msbody4.pdf 71.41 Kb 00:00:19 00:00:10 00:00:08 00:00:04 < 00:00:01
  msfrontz.pdf 14.45 Kb 00:00:04 00:00:02 00:00:01 < 00:00:01 < 00:00:01

Browse All Available ETDs by ( Author | Department )

dla home
etds imagebase journals news ereserve special collections
virgnia tech home contact dla university libraries

If you have questions or technical problems, please Contact DLA.