Other issues cited include failures of rear cargo doors, seat backs, window latches, excessive roof crush, vehicle incompatibility in multi-vehicle collisions, body panel retention, and driver mishandling of the vehicles. The paper concludes by identifying a number of recommendations for the continuation and expansion of the study of light truck and van collisions leading to the modification of federal safety standards. The system monitors sections of the highway system with video cameras and has panels for variable messages. The initial system was set up in 1994 on the Metropolitan Boulevard, a high density expressway with over 160,000 vehicles per day, to improve traffic safety, to reduce delays due to incidents, warn motorists of slowdowns and blockages, and to reduce access time for emergency assistance by police, ambulances and fire trucks. Risk ratios were estimated using negative binomial regression models.
Risk ratios vary by category of diabetes.
Permit holders for single-unit trucks who are diabetic without complications and not using insulin have an increased risk of 1.68 when compared with healthy permit holders of the same permit class. When controlling for risk exposure, the subset of commercial drivers of the same class and same medical condition have an increased risk of 1.76. The increased risk for the group not using insulin and with uncomplicated diabetes is a new finding. Insulin use is not associated with higher crash risk. There have been a number of studies which explore accident rates and characteristics of elderly drivers as a whole, but there has been little research into the accident characteristics and travel needs of the rural elderly.