A “trial run” is a drive through the speed zoned section of roadway at the chosen speed(s) to determine if the speeds are appropriate for the area.

After the 85th percentile speeds and zone lengths have been selected, several trial runs should be made through the area in both directions driving at the selected speeds. This should show any irregularities in the zoning which need correction.

Documentation.

Trial runs may be documented using the Summary of Trial Run for Speed Zones (TxDOT Form ) to supplement a strip map. (The form is available via hyperlink — click on the form number above — or from the Traffic Operations Division.) Figure 3-10 , shows an example of a completed Summary of Trial Run for Speed Zones.