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District 1 Dilemma Zone Detection Candidates - A custom python toolbox developed by JMT is used in ArcGIS Pro to identify locations that are potential candidates for application of dilemma zone detection along FDOT-managed roadways in District 1.
Locations are first filtered to identify isolated signalized intersections with approach speeds of 50 mph or greater. These locations are attributed with the number of rear end crashes and crashes with a contributing cause of red light running over 5 years (2015- 2019). The crash counts can be used to prioritize the locations for dilemma zone detection countermeasure application.
This countermeasure analysis result layer and JMT-managed source data layers are to be updated by JMT only upon request of District 1 stakeholders. Source datasets for this analysis include District 1 Signalized Intersections (produced by JMT with data provided by District 1), FDOT Maximum Speed Limit, and Crash Data from 2015-2019. Note that the FDOT-managed source data used in the analysis was downloaded from FDOT's TDA website in file geodatabase format by JMT in May 2022; thus the currently displayed FDOT-managed reference layers may be out of sync with the analysis source data.
Contact: JMT Technology Group: Mallory Gill, mgill@jmttg.com, (757-552-1099)
Published May 2022