California officials are “racing against time” to fix a pricey stretch of highway that is at risk of falling into the ocean and crippling an entire region.

The cliff-hugging section of U.S. 101, which links Eureka to Crescent City, has had a string of “multimillion-dollar band-aid” fixes throughout the years, including squeezing the highway into one lane. The area has been monitored, and field studies have been conducted. Now, Caltrans (California Department of Transportation) believes the best long-term option would be to build a 6,000-foot tunnel that would bypass the landslide area.