Chase,
I manage the safety at a large harvesting company and deal with this issue all the time. So what I did was video taped them, took a reading with a speed radar gun and then sat everyone down that I taped and had forklift safety training all over again. Well lets say this only worked for the first few weeks then they were back to their old ways. So what I did was had the forklift company come out and put throttle limiters on the gas pedal so they could only go SLOW ALL THE TIME. This seems to work and has dropped our forklift accidents by 75% just in the first 6 months!!
Hopefully this helps you.
OXBO
Jason