The most common bicycle and pedestrian infrastructure that state Departments of Transportation reported providing training on were protected bike lanes, HAWK signals, buffered bike lanes, leading pedestrian intervals, and rural bicycle routes.
Data is from 2021 Bicycle Friendly State survey response to the question, "Did the state DOT sponsor one or more trainings that included instruction on the following infrastructure type in the last two years?" Several of the infrastructure types are inclusive of other similarly functional infrastructure. For example, in the full question, HAWK signals include "High intensity Activated cross WalKs," Rectangular Rapid Flashing Beacons, and other enhanced crossing treatments.