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AHMCT researchers developed a prototype machine with the main purpose of collecting garbage bags placed on the roadway by cleanup crews. The machine will attach to trucks in the Caltrans fleet and will be mountable on either side of the truck with minimal modifications and impact to the truck’s current functions. The reduced cost of using current trucks will allow multiple units to be purchased, simultaneously increasing productivity, reducing costs, and reducing worker exposure to traffic.

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.

AHMCT is researching the roadside maintenance work environment to identify cost-effective deployable improvements to methods, equipment, and processes that will lessen worker injuries, increase worker effectiveness and support Caltrans goals of safety and stewardship.

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.

AHMCT researchers developed a prototype machine, a dexterous manipulator, attached on a commercially available vacuum truck. AHMCT is supporting the testing and evaluation of the Vacall ARDVAC machine in Caltrans operations.

AHMCT researchers developed a prototype machine that enables a single driver operator to place or retrieve a lane closure with up to 100 cones. Design of a high capacity machine for up to 300 cones was also developed. In 2005 the Traf-tech Corporation produced a commercial machine based on the AHMCT design. AHMCT is supporting the testing and evaluation of the Traf-tech machine in Caltrans operations.

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 […]