Projects under mobility

AHMCT researchers have developed, deployed, and currently maintain several self-contained vision based sensor systems which autonomously monitor hazardous highway locations. These devices provide web-based access to both live video and recordings of past incidents trigged by configurable events. These sensors were originally developed to collect highway crash attenuator impact data and have been on-line monitoring vehicle traffic incidents for over a year and half. The monitoring device is an ideal tool for the collection of traffic incidence data which would be useful for the assessment and mitigation of hazardous highway locations

Outcome Pilot project places in the hands of Caltrans Maintenance two innovational Tow Plow trailer units for testing and evaluation in snow fighting operations on major highways over high mountain passes. Benefit Expand the Caltrans level of service in snow clearing operations keeping essential highways clear while reducing operational and equipment costs. A Tow Plow […]

Two Caltrans workers have been killed recently while attempting to patch highway potholes. In an immediate response to mitigate this hazard, Caltrans Divisions of Research and Maintenance are supporting an AHMCT research effort to deploy innovative equipment to Caltrans Maintenance crews to dramatically reduce worker exposure when conducting highway patching operations.

Three quarters of road subbase eroding water intrusion enters along the longitudinal edge joint on concrete highways. The conventional means of sealing these joint cracks requires workers to be exposed to high-speed traffic. In addition, workers on average seal less than a mile a day. AHMCT has developed and deployed the Sealzall machine which automates the sealing of longitudinal joint cracks. The system seals an average of 10 miles a day with the same crew size and support vehicles. Automating the entire heat-up and sealing process eliminates worker traffic exposure and enables the sealing to occur in a rolling traffic lane closure operation. The Sealzall heated sealant hose and wand assembly supports material recirculation and manual in-lane random crack sealing operations.

GPS-ATD App running on various Android smartphones

The second-generation GPS-ATD to replaces traditional paper-and-pencil and computer-assisted approaches for travel surveys. The GPS-ATD minimizes the user burden during longitudinal travel behavior surveys, while providing accurate, reliable, and spatially dense traveler behavior data at a significantly reduced cost. The second-generation GPS-ATD leverages commercially available hardware combined with an enhanced version of AHMCT’s travel diary software platform.

Advanced Traffic Management Systems (ATMS) are effective in reducing congestion and collisions. Caltrans has implemented an ATMS in five of twelve Caltrans districts and would like to implement a standardized ATMS in the remaining districts. However, the current ATMS was designed in the early 1990s and uses proprietary single-source components. The price inelasticity of proprietary software leads to ever- increasing acquisition and upgrade […]

I-80 over Donner Pass is a harsh place in winter, with up to 35 feet of wet snow that comes in intense storms that can totally obscure vision. In places, the highway borders thousand-foot drop-offs and traverses ice-covered bridges. Yet, Caltrans must keep the Pass open, for I-80 is vital to commerce in the Northern California region. This page presents a joint effort by Caltrans and AHMCT to develop and deploy a safer and more efficient way to keep […]

AHMCT researchers are developing a cost-effective mobile information system for snow fighter supervisors to provide in-vehicle access to critical information needed to make timely decisions. The system simultaneously increases supervisor situational awareness and enables them to stay in the field longer to assist and communicate with snow fighter crews. […]

AHMCT researchers have developed a deployable prototype system for bridge profile sensing from a vehicle at highway speed, i.e. with no fixed or rolling closure. The system uses a scanning laser to measure range and reflected power from the bridge and the roadway. The laser data is analyzed by custom software to determine bridge height measurements, as well as lane widths and other horizontal dimensions. The software includes a user interface […]

AHMCT researchers have developed an intelligent sensing system for detecting road-embedded magnetic reference systems. The system addresses drawbacks of previous research prototypes, and moves magnet-based vehicle guidance and control closer to real- world application. The patented system works for both discrete embedded magnets and continuous magnetic references, i.e. “tape,” and can be applied in highway maintenance, transit, commercial vehicle, loading, factory, and airport operations.