Walter & the editor discuss the use Global Positioning Systems (GPS) for locating traffic signs. They also mention Geographic Information System (GIS) databases as a means for cataloging these sign … [Read more...] about Walter Workzone Speaks up about GPS, GIS, CAD and Traffic Signs
Navigation Systems
Reconsideration of Sample Size Requirements for Field Traffic Data Collection Using GPS Devices
In recent years, the use of GPS technologies has expanded to perform traffic data collection for transportation studies such as work zone studies. To generate reliable results from the data acquired … [Read more...] about Reconsideration of Sample Size Requirements for Field Traffic Data Collection Using GPS Devices
Measuring and Analyzing Vehicle Position and Speed Data at Work Zones Using Global Positioning System
In order to analyze traffic characteristics at highway work zones, traffic flow has been measured through various types of traffic measuring devices. The limitations of the conventional traffic … [Read more...] about Measuring and Analyzing Vehicle Position and Speed Data at Work Zones Using Global Positioning System
Autonomous Shadow Vehicle Project: Phase I
The subject of this report is the research performed to determine the feasibility of designing and constructing a prototype autonomous Shadow Vehicle that follows a Lead Maintenance Vehicle for use in … [Read more...] about Autonomous Shadow Vehicle Project: Phase I
Effect of Radar Transmissions on Traffic Operations at Highway Work Zones
A series of field studies was conducted at highway work zones where low-output radar transmissions were emitted (by motion detection devices) without the presence of visible law enforcement. Data were … [Read more...] about Effect of Radar Transmissions on Traffic Operations at Highway Work Zones
Speed Reduction Effects of Drone Radar in Rural Interstate Work Zones
Three experiments were conducted to evaluate the effectiveness of using drone (passive or unmanned) radar guns on vehicle speeds in construction zones. Experiment 1 was an exploratory study to find … [Read more...] about Speed Reduction Effects of Drone Radar in Rural Interstate Work Zones