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25 The general structure of the survey includes three main groups of questions dealing with on-site calibration using test trucks, calibration using traffic stream vehicles of known static weight, and calibration monitoring using properties of the traf- fic stream. The corresponding series of questions in Appendix B are 3.5, 3.6, and 3.7. The survey was structured in a way that allowed identifying the role of the agency responding; that is, either a DOT collecting traffic data, an enforcement agency performing load limit screening, or both. The questionnaire was input into a proprietary web-based format that allowed agencies to respond online. Statistics on the number of ques- tionnaires distributed and the response rate are shown in Table 11. Of the agencies that responded to the questionnaire, 7 used WIM for both data collection and enforcement and had a common agency for managing these systems. The Connecti- cut DOT submitted two responses, one for traffic data collec- tion and another for research. Table 12 shows a summary of agency responses by state. Where necessary, questionnaire distribution was followed by telephone interviews to assist responders in filling out the survey and ask for any additional documentation available. CHAPTER THREE SURVEY QUESTIONNAIRE DOT Questionnaires Circulated = 53* Enforcement Agencies Questionnaires Circulated = 15** 34 7 11 Traffic data No Response Traffic + Enforcement *50 States + DC + Puerto Rico 1 extra for research by Connecticut 4 11 No Response Enforcement Only **13 States do not use WIM in enforcement, 16 had no identifiable enforcement agency TABLE 11 SURVEY QUESTIONNAIRES CIRCULATED AND RESPONSES RECEIVED
26 TABLE 12 SUMMARY OF AGENCY SURVEY RESPONSE BY STATE Traffic Data Enforcement Delaware NR NC District of Columbia NR NA Hawaii NR NC Iowa NR NC Kentucky NR NA Maine NR NC Minnesota NR NA Missouri NR NC Arkansas NA Florida NC Georgia NA Illinois NA Indiana NR Kansas NC Massachusetts NA Maryland Louisiana NA Idaho Michigan** Mississippi NA New Hampshire NA Nebraska Montana Nevada** North Carolina NR New Mexico NC New York NA New Jersey NA Connecticut NR Alaska NA Alabama Arizona California** Colorado South Carolina NR NC South Dakota NR NA Oklahoma NA NA Pennsylvania NA Puerto Rico Tennessee NC Texas NA Utah NC West Virginia NC Wisconsin NC Wyoming NA Vermott** Virgina Washington Rhode Island NR Ohio** North Dakota** Oregon** ** = state submited one questionaire for both traffic and enforcement systems. NA = agency does not use WIM for this purpose. = agency responded. NR = agency did not respond. NC = no contact identified to fill survey.
