Since the implementation of this law, AAA's surveys have discovered that teenage passenger deaths and injuries decreased 21.4 percent statewide. The nine Bay Area counties have experienced an average decline of 25.7 percent. Santa Clara County was impacted by a dramatic reduction of 42.9 percent in teenage accidents. Worsened weather conditions also contribute to teenage deaths. Nighttime driving, already considered a difficult experience due to limited visibility, is considerably dangerous for novice drivers.
Teenagers drive excessively at night and have a significantly higher nighttime crash fatality rate.
According to Erlingsson, this predicament was addressed in the second restriction of the GDL program. California teens with provisional licenses are placed under curfews between 12 a.m. and 5 a.m. In addition to this factor, adolescents who consume alcohol or other contraband substances are at a particularly greater risk. DUI is a factor. However, this tends to appear more in later years, particularly with drivers in their 20's.