'The State of Idaho Highway Safety Plan, Fiscal Years
1981-1984, which encompasses the period before and after the law was
passed and implemented, stated that the injury rate for bicycles was
constant overall and that "there is no evidence that [bicycle]
fatality rates differ from the national level." Moreover, in the year
following its introduction, bicycle injury rates in the state actually
declined by a substantial 14.5% with no change in the number of
bicyclist fatalities. While aggregate injury rates include numerous
types of collisions, the decline in injuries is consistent with the
strong indication that the law actually improves roadway
safety.'