As Caltrans explored new methods to improve operator and public safety during inertial profiler (IP) operations, the agency identified Stop-and-Go IPs as a promising advancement. Stop-and-Go Ips is a new technology that collects pavement data at low speeds without shutting down traffic lanes, making testing safer, faster and more efficient. Unlike traditional systems, these units can function effectively in variable-speed environments such as urban corridors. However, existing test methods did not account for their use, creating a need for technical expertise and updated certification standards.
Atlas partnered with Caltrans to provide technical guidance and support in evaluating Stop-and-Go Ips for use in quality control and quality assurance roadway smoothness operations. Selected through a qualifications-based process, Atlas worked collaboratively with Caltrans and industry partners to assess equipment performance across a range of traffic conditions, including stop-and-start movement, braking and acceleration.
Findings from these efforts informed updates to CT 387, Caltrans’ specification for profiler certification. Revisions addressed key areas such as survey speed variability and performance consistency under typical urban conditions. Atlas supported the implementation of these updates ahead of the 2024 Inertial Profiler Certification Program (IPCP) season.
Through targeted task orders and focused coordination, the team helped Caltrans align certification standards with emerging technology while maintaining a commitment to safety, reliability and industry engagement.