In our inaugural episode of “Unboxed: The SRF Podcast,” we sit down with three of our in-house experts from SRF’s Intelligent Transportation Systems and Connected and Automated Vehicles (ITS/CAV) group to discuss a groundbreaking study conducted for the Minnesota Department of Transportation (MnDOT).
Work zone safety is a critical priority for the transportation industry. As modern vehicles become increasingly equipped with lane-keeping systems and other Advanced Driver Assist Systems (ADAS), a vital question emerges: How do these systems perform when they leave the standard highway and enter the complex environment of a work zone?
Behind the Scenes of the Study
The research team — including SRF’s Erik Minge, Uthej Vattipalli, and Jon Jackels — partnered with MnDOT, ViaSight, and Safety Signs to put lane-keeping technology to the test. The study was split into two distinct phases:
- Controlled Testing at MnROAD: Using a closed-loop track, the team tested 15 different scenarios, ranging from various pavement marking removal methods to the use of different channelizers like drums and cones. (Bonus: Watch a Video on the MnROAD Tests)
- Real-World Trials: The team took the vehicles onto active projects in cities like Austin and Princeton to see how the technology responded to live traffic and varying pavement conditions.
Key Highlights from the Conversation
During the episode, the panel shared several surprising “edge cases” where technology and infrastructure didn’t quite align:
- The “Black Box” Challenge: Because vehicle manufacturers use proprietary systems, SRF used proxy analytics from ViaSight to understand how the vehicles’ systems were responding to real-time road conditions.
- Drums vs. Lines: While most systems are excellent at following painted lines, many do not yet recognize a line of construction drums or cones as a “lane separator,” sometimes requiring immediate driver intervention to avoid a collision.
- Removal Methods Matter: The study found that water blasting was the most effective method for removing old markings, as other methods like grinding or blackout tape could sometimes confuse the vehicle’s sensors.
Why This Matters
As we move toward a future with more autonomous features, understanding these limitations is essential for roadway designers and the traveling public. This study provides a “snapshot in time” that helps MnDOT and other agencies adapt their work zone designs to keep both drivers and workers safe.
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Disclaimer
The views and opinions expressed in this podcast are those of the speakers and do not necessarily reflect the official policy or position of SRF Consulting Group. This podcast is for informational purposes only and does not constitute professional engineering advice. Listening to this podcast does not create a consultant-client relationship. Always consult with a qualified professional for your specific project needs.