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RoadSafe GIS Blog

Learn about our latest software updates, traffic safety related research and funding, and other topics.

California HSIP Cycle 7

UPDATE: See Cycle 8 blog post for the latest information. Caltrans has announced plans for $150 million to be distributed during the Highway Safety Improvement Program (HSIP) call for projects. The goal of the federally mandated HSIP is to: Achieve a significant reduction in traffic fatalities and serious injuries on all public roads,…

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Collisions vs Injuries

Evaluations of collision data inevitably require summarizing the number of collisions or injuries occurring on a roadway or region. Target safety goals, baseline analyses of conditions and comparative rankings are all based on counts. However, when reviewing the numbers it’s important to make sure you are comparing apples to apples…

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Querying for pedestrian related collisions

Collision data is inherently complicated since it attempts to aggregate all the elements of a collision into a nice, standardized database. The breadth of information available contributes to the complexity and can make it quite daunting for someone to understand without extensive experience working with the data. I wanted to…

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Collision data GPS coordinate accuracy

The usefulness of RoadSafe GIS or any other software solution is heavily dependent on the quality of the input data. For collision data, the location information is particularly important and in recent years police officers have begun including Global Positioning System (GPS) coordinates in collision reports. Hypothetically using a GPS…

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