According to the Center for Neuro Skills, "The implementation of effective bicycle helmet programs could have a substantial impact on rates for fatal and nonfatal bicycle-related head injury. For example, from 1984 through 1988, if a presumed helmet-use rate of 10% had been increased to 100% (i.e., universal helmet use), an average of 500 fatal and 151,400 nonfatal bicycle-related head injuries could have been prevented each year."
SJSU has a bicycle policy allowing the use of bicycles on campus without helmets. The few provisions to provide to improve the safety of both cyclists and pedestrians need better enforcement. I am talking more about this issue on another of my blogs.