In California, freeway callboxes were used about 98,000 times in 2001. That number dropped by 80 percent to 20,100 times in 2010, or about 1 call per box per month. The cost of callboxes for the Service Authority for Freeways and Expressways (SAFE) program in the San Francisco Bay area is $1.7 million annually. As a result, since 2009 approximately half of the callboxes have been removed from certain California highways, preferentially leaving them only in places where cell phone coverage is poor.