Another common concern involves traffic signal timing modifications due to changes in speed limits or lane configurations. Ultimately, if changes are made, the yellow change and red clearance times during preemption cannot be less than what is programmed for normal operation of the signal for any phase. If the yellow change and red clearance times increase under normal operation, the times must also increase under preemption and other time during preemption must be sacrificed. This could typically occur by reducing delay time, minimum green time during right of way transfer, pedestrian timing during right of way transfer, or separation time and would require the preemption form be updated by the district railroad coordinator.

If a traffic signal is upgraded to accommodate pedestrian movements, the preemption setup should also be evaluated to see if pedestrians should be considered during preemption.

Finally, any changes to a roadway intersection adjacent to a railroad crossing should be coordinated with the affected railroad company. This includes work performed off railroad right of way to ensure no traffic impacts to the railroad crossing or preemption setup.