SafeSpeed is designed to proactively limit a school bus’s maximum speed to match posted speed limits. Using advanced GPS location information, SafeSpeed stops acceleration over speed limits in real time with the aim of helping to prevent speed-related school bus accidents. A test on 10 buses saw a 96% reduction in speed events 10-plus miles per hour over the speed limit, and a 99% reduction in speed events 15-plus miles per hour over the speed limit, according to the company.