Problem: A 300 foot section of Historic HWY 1 was experiencing some cracking and road faulting. After engineers tested the roadbed, it was discovered that there was poor soil compaction ranging 3-12 feet under the highway. HWY 1, is a major road connecting communities from Los Angeles all the way up to San Francisco. This historic highway is a scenic drive that most choose for their daily commutes. When the California Department of Transportation (CALTRANS) planned to complete maintenance on the highway, they needed to take into consideration the shut down time and how it would impact residents commuting for work. They estimated a complete shut down of the highway would add hours onto their uninterrupted commute time. CALTRANS needed to find the best solution to stabilize this roadbed without a complete shut down. Our team members performed the Polyurethane foam injection on this project.