Liabilities in Temporary Structures Failures?Representative Case Histories
Eight case studies involving construction accidents caused by failure of temporary structures are presented. These studies illustrate the oftentimes unintended consequence of utilizing...
Design of HCM Signal Timings Using Signal Expert
While computer implementations of the procedures for evaluating the operation of traffic signalized intersections are receiving widespread use, these implementations are still primarily...
Video Image Processing for Toll Operation Evaluation
Toll motorway companies are very much concerned with toll plaza operation and its appreciation by customers. The problem is two-fold: define a desired level of service (queue lengths,...
Vehicle Lateral Guidance Using a DSP Based Vision System
A practical real-time vision system system which uses a digital signal processing chip to obtain a tracking error for lateral guidance of vehicles at highway speeds is presented. Minor...
Microcomputer Based Traffic Signal Inventory Records
This paper describes microcomputer software used by District 12 of the Texas State Department of Highways and Public Transportation to provide for a constantly updated inventory of traffic...
Accommodation of Large Trucks: Traffic Control Issues
The objective of this paper is to identify ways that large trucks can be accommodated safely and efficiently through traffic control. Traffic control is herein defined as encompassing...
Highway Safety - Is the Job Finished?
A review of past measures undertaken to improve highway safety is given. The Highway Safety Acts have helped reduce the number of injuries and fatalities in spite of the increased number...
How Uncle Sam Values Mortality Risk Reductions
This paper reviews the policies, methods and 'value-of-statistical-life' (VSL) estimates used by several federal agencies to assess the economic efficiency of...
A Case for Science-Based Road Safety Design and Management
What civil engineers do has a major effect on road safety. However, contrary to appearances, the level of safety built into roads is largely unpremeditated. Standards and practices have...
Safety on 21st Century Highways
Consistently high geometric design standards, adequate pavement skid resistance, drainage and markings, and appropriate signing, delineation and lighting all reduce the potential for driver...
SIDRA?An Australian Program for Signalised Intersection Analysis
As more complicated signal phasing systems have been implemented in practice, the analysis methods have moved from a phase-control philosophy applied to approach roads to a group-control...
Use of CAD for Traffic Sign Design Purposes
At present, AutoCAD is the most popular CAD system for micromputers. It is relatively inexpensive and is very flexible, comprehensive, and easy to use. A preliminary review of AutoCAD...
Effective Pedestrian Safety Programs
Pedestrian fatalities account for 16 percent of all highway-related deaths and about 129,000 pedestrians are involved in accidents each year. Analyses of pedestrian accident data and determining...
Some Questions on the Accuracy of Safety Effectiveness Evaluations
The generally positive benefits of safety improvements, and, in particular, upgraded traffic control devices, are well-established. More difficult is the explicit rank-ordering of traffic...
Evaluating the Effectiveness of Highway Safety Improvements
The need exists for better information relative to the effectiveness of various safety treatments and actions. Reliable measures of effectiveness are required for determining the most...
Delineation Effectiveness for Alcohol Involved Accidents
The approach to the problem of the alcohol impaired drivers to date has been directed at driver education and increased police enforcement. A complementary and parallel approach is presented...
Sighting Safety
This paper examines the interrelation between drivers' visual needs and the road environment. Specific elements of visual limitation and drivers at greatest risk are identified....
Location and Development of Safety Projects
Projects to be considered for inclusion in the Highway Safety Improvement Program (HSIP) must be part of a prioritized listing in which each project is based on accident experience or...
Methods for Real-Time Control of Highway Traffic
The paper describes the development of computational strategies for demand-responsive decentralized traffic signal control. First, a Dynamic Programming procedure is developed which serves...
Managing the Highway System
There is a general feeling that increased emphasis on highway management is a promising approach to dealing with a series of apparent issues and trends: The inflating costs of substantial...
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