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42 TABLE 14 PUBLIC PERCEPTION SURVEY ON ATCS DEPLOYMENTS Results from Public Perception Survey Percent of Agencies Clearly supportive 21 Somewhat supportive 36 Neutral 36 Unsupportive 7 SUMMARY The chapter also provided a list of the most common perfor- mance measures collected during the ATCS evaluations. The This chapter identified the major costs and benefits associated majority of the users' evaluations (71%) reported that ATCSs with ATCS deployments. Licensing costs to install propri- outperformed conventional traffic signal systems. However, etary software are only 10% to 15% of the overall installation the benefits of ATCS deployments are not observable in over- costs and they do not appear to represent a significant cost saturated traffic conditions. Although ATCS users find that to customers. The survey results showed that ATCS instal- their systems delay the start of oversaturation and reduce its lation costs per intersection (approximately $65,000) are duration, ATCSs are not recognized as a cure for oversatu- higher than reported in the previous literature (approximately rated traffic conditions. Most of the users do not perceive that $40,000). Interestingly, ATCSs require less money than con- the performance of their ATCSs degrade over time--a find- ventional traffic signals for their physical maintenance, when ing that is quite remarkable considering some of the user com- their shares in overall budget and overall operations are com- ments. Public education campaigns about ATCS deployments pared. This finding contradicts the common belief in the traf- are not very common or effective, as indicated by most of the fic signal community, where ATCSs are known for the costly ATCS users. Also, not many of the ATCS agencies conduct maintenance of their detectors and communication systems. public perception surveys. Those agencies that do reported Most agencies prefer to hire outside consultants for ATCS that results from such surveys are supportive approximately evaluations, who mainly perform field evaluations through a 60% of the time. The next chapter focuses on lessons learned set of before-and-after studies. Other alternative methods of communicated through user perspectives on several questions performing evaluations are much less frequently represented. from the survey.