Analyzing the Effects of Different Signs to Increase the Availability of Designated Van-Accessible Parking Spaces

This article reports on a single subject study with two settings, undertaken to examine the effectiveness of standard van sign versus intervention signs (pictorial representation of a ramp-equipped van plus messages) used to designate van-accessible parking spaces. The authors note that the van-accessible parking spaces are often occupied by other vehicles, who may have the appropriate accessible permit but who do not need the extra space that a ramp or lift-equipped vehicle requires. The study had two phases, a multiple treatment design to compare the effects of the intervention signs during phase 1 and a reversal design to test and validate the most effective intervention effects during phase 2. The authors found (based on observation) that the interventions signs could moderately reduce the chances of non-ramp or lift-equipped van users parking in the designated van accessible parking space. The effects of the signs were not consistent across stores; one setting found that the more-courteous signs were the most effective, the other setting found that the warning-style sign was more effective. The authors conclude by discussing the implications of their research and offering recommendations for changes in state and national accessible parking policies.


  • English

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  • Accession Number: 01682925
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Apr 12 2018 1:30PM