This section includes information on the availability of several local calibration factors and newly developed SPFs for Texas roadways. Recently, TxDOT has developed local calibration factors for most of the SPFs in the HSM to apply for Texas roadways within both rural and urban areas. The calibration factors are also available by four different regions (East, West, North, and South Texas) separately for all facility types – rural two-lane and multi segments, urban segments, rural and urban intersections, and freeway main lanes. Since Texas has a large network of frontage road segments and different ramp configurations, new safety prediction models for one-way and two-way frontage roads and ramp segments are also available, with SPFs accounting for both single and multiple vehicle crashes separately. This provides an accurate estimate of the number of predicted crashes on Texas roadways.

Specific to urban freeway segments, the calibration factors for urban freeway segments with 4-10 lanes and new safety prediction models for urban freeway segments with 11 or more lanes and freeways with managed lanes are available. It provides a good resource for predicting crashes on urban freeway segments with even 11 or more lanes and including those with managed lanes. The details are provided in research reports 0-7067 and 0-7083. An analysis spreadsheet tool is under development to help practitioners implement the new models to facilitate analysis of all rural and urban roadway segments and intersections.