045-I Wyo. Code R. § 1.3
(1) The Speed Study Data Collection Sheet (Form TR-10) has been developed in conjunction with the Speed Study Worksheet (Form TR-11) for the collection of speed data in the field. These forms can be obtained from the Wyoming Department of Transportation for use on a computer. An example of a blank collection sheet is shown in Figure 1-1. To limit the range of speeds to what is allowed by the worksheet, the lowest anticipated free-flow speed at the study location must be entered in the red box. To help determine what value to enter in the red box, Table 1-1 provides some guidance on what lowest anticipated free-flow speeds might apply based on the posted speed limit and whether the area of the study is in an urban area, urban/rural fringe, or in a rural area.
Table 1-1 Lowest Anticipated Free-flow Speeds
| Posted Speed (mph) | Extent of Roadside Development | ||
| Urban | Fringe Area | Rural | |
| [LESS THAN EQUAL TO] 30 | 10 | 10 | - |
| 35 - 40 | 10 | 15 | 20 |
| 45 - 50 | 15 | 20 | 25 |
| 55 - 60 | 25 | 30 | 35 |
| [GREATER THAN EQUAL TO] 65 | - | 40 | 45 |
(2) Prior to heading to the field to collect spot speed study data, it is recommended that several Speed Study Data Collection Sheets having varying lower limits be printed out for use by the data collection personnel.
(3) When collecting speed study data, fill out the heading of the Speed Study Data Collection Sheet completely.
(4) The observer enters a tally mark (\) in a data block under the appropriate direction for each observance of a speed. If more than 15 vehicles are observed at any particular speed in one direction, tally marks slanting in the opposite direction can be entered over the tally mark previously entered thus forming an X, which represents two vehicles observed at that speed. An example of a completed Speed Study Data Collection Sheet is shown in Figure 1-2.
(5) If there is no interest in knowing the speed statistics for each direction, but only the combined directions, then all speed observations for both directions of travel can be entered in one column. This avoids having to add the number of tally marks from the two directions when entering the data into the Speed Study Worksheet.
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(6) The Speed Study Data Collection Sheet can also be used to document speeds based on vehicle class, either by direction or for both directions. This is accomplished by using one-letter classification codes rather than tally marks. Classification codes that may be used include the following:
P = passenger vehicle (includes cars, pickups, vans and SUVs)
T = truck (includes single units with 6 or more tires, buses, RVs, and pickups pulling trailers)
S = semi-truck (tractor-trailer combinations)
M = motorcycle
045-I Wyo. Code R. § 1.3