Map: These California Bay Area towns could face major traffic jams during an emergency, per new report

The researchers gave scores to cities across the country based on the total population of the town, the number of roadway exits out of town, and the average number of cars each exit route carried on a typical day, assuming residents would choose familiar routes in an emergency.

Of the 30,000 communities analyzed, around 800 had scores that were three or more times the national average, including 107 in California, indicating that residents there had fewer options when it came to fleeing in a hurry. Twenty-two of the towns and cities are in the Bay Area, and one is in Santa Cruz County.