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LOSS is reported in this dataset only where crash patterns have been previously identified for highway segments and intersections. This product was produced in 2015 from crash data circa 2009 - 2013. LOSS is reported in levels 1 through 4 (1 = low potential for accident reduction, 2 = low to moderate potential for accident reduction, 3 = less moderate to high potential for accident reduction, 4 = high potential for accident reduction). LOSS values for total accidents may be the same as LOSS values for severity accidents, though the values can be different (e.g. LOSS total for a segment could be a 2 for Total LOSS and 3 for severity). LOSS values were determined using a cumulative probability threshold of 80th percentile and a minimum number of 5 crashes. Intersection locations were mapped using CDOT's 2013 linear referencing system. Approximately 927 out of 2457 records had no LOSS values reported. The database contains fields for LOSS Total and LOSS Severity (injury + fatal), and crash patterns by category.LOSS is calculated using DiExSys Vision Zero Suite (VZS). LOSS was generated using spreadsheets provided by David Swenka with CDOT. This dataset represents an interim product; new SPF models will soon be developed and will affect the LOSS. An additional task has already been identified to run LOSS statewide upon completion of the updated SPF models. |