End collecting RMS data on the driver. You can use RMSE with the RMSB event to collect RMS data anytime during a simulation run except when the PI event is being used. If the PI event is being used, you can never use the RMSB/RMSE events. No additional parameters are required. For reference, the RMS here refers to the Root Mean Square of the deviations. This is more commonly know as simply standard deviation.

2000,RMSB,0,Curve to the right with 2 pedestrians

3000,RMSE

In the above example, the simulation will begin collecting a block of RMS data (2000,RMSB,) after the driver has traveled 2000 feet down the road and the RMS data block will end after the driver has traveled 3000 feet down the road (3000,RMSE).