California HSIP Cycle 8

Caltrans has announced the HSIP Cycle 8 call for projects. Applications are due August 12th, 2016, so you should already be working on them now. More information and official application forms are posted on their website: http://www.dot.ca.gov/hq/LocalPrograms/HSIP/apply_nowHSIP.htm. In response to the new cycle, we have updated our HSIP Helper application tool. The HSIP Helper allows you to quickly explore potential benefits for all the systemic countermeasures and is a great starting point. Instead of reviewing potential countermeasures one by one it calculates and displays all of them by categories (signalized intersections, non-signalized intersections, and roadway). Documentation is available to help you […]

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San Diego geocoded SWITRS data

As part of our ongoing work to test and improve our geocoding processes, we recently looked at SWITRS collision data for the City of San Diego. In my past work when attempting to geocode data for San Diego, we found the various street networks were quite outdated compared to other areas in California. I presumed it was due to rapid population growth but a quick Google search surprisingly showed that might not have necessarily been the case: http://www.sandiegouniontribune.com/news/2011/mar/08/san-diego-growth-last-decade-is-the-slowest-ever/ Regardless of the reasons, it was difficult to geocode collisions since there were many new streets in the suburban areas.  In order to […]

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Spatial and corridor query filters now available

We are pleased to announce spatial and corridor query filters are now part of the RoadSafe GIS Collision Database Management System. Our last blog post outlined the preview features option for querying large datasets. Now these new filters will allow users to more precisely target collisions within their jurisdiction and maintain optimal browser performance displaying the results. The spatial filter allows you to draw a shape over a geographic area and restrict results to that area. The results will also incorporate any other filters you may have selected such as the type of collision or collision severity. You already had the capability to spatially select […]

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New preview results option for general queries in RoadSafe GIS

We have recently been adding features to our Collision Database Management System to better handle client jurisdictions with large numbers of collisions. The first new feature is a preview results button for general queries. Before displaying a full results page that includes a list of all collisions, tables and charts, and a map, the preview results shows key summary statistics. The preview includes total collision counts, total victim counts and breakdowns of the collisions by severity, type and motor vehicle involved with: Often times these key summary statistics may be all a user is looking for and this will provide […]

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Property Damage Only (PDO) collision count trends in California counties

Property Damage Only (PDO) collisions refer to any collision in which none of the involved parties were injured. In California there is a great deal of variability how PDO collisions are collected and reported by local police departments. Unlike injury involved collisions, it is not required to report PDO collisions to the Statewide Integrated Traffic Records System (SWITRS). Therefore individual police departments set their own standards on how to collect, manage and report PDO collisions. Due to this variability, most research and analyses typically exclude PDO collisions. It would not make sense to conduct a statewide study of all collisions […]

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Does the map provide value to the analysis?

We have been busy working on several projects so I have not had a chance to blog recently. Since it is GIS Day, however, I think I owe another blog post given the proliferation of maps on the web these days, especially in the mainstream media. There are now many data journalists that have been empowered by numerous free and easy to use tools to complement their analyses with a map. Does that mean you should always include a map though? When I look at a map now I try to think about whether the map provides real value to the analysis or […]

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RoadSafe GIS accepted to the Esri Emerging Business Program

RoadSafe GIS is pleased to announce we have been accepted to the Esri Emerging Business Program.  RoadSafe GIS was accepted as part of the Esri Startup Program which provides a generous offering of software, support, training and more to new businesses less than 3 years old that are building software-as-a-service (SAAS) solutions. Stay tuned during the next few months as we will be leveraging Esri’s software to develop new services for geocoding collision data and streamlining our current RoadSafe GIS solution workflow.  

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Geocoding collisions with invalid offset directions

Today’s blog is the final post in our geocoding overview series and addresses the scenario where a collision cannot be offset from the intersection due to an invalid offset direction. Although this situation can occur at any intersection, it is more likely to occur along longer roads such as state highways where small segments vary from the general orientation of the route. A great example is the Pacific Coast Highway (California state route 1) in Los Angeles. The Pacific Coast Highway is typically oriented north/south, but in some locations it becomes east/west or slightly opposite. This can create a mismatch with the offset direction in the […]

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Network screening performance measures

Today’s blog provides details of the newly added network screening performance measures within RoadSafe GIS for calculating high collision intersections. Check out our previous blog post for an overview of network screening and the Highway Safety Manual (HSM). Another excellent resource that we previously overlooked is the FHWA’s HSIP manual. Unlike the HSM, the HSIP manual is freely available and contains many of the same details outlined in the HSM. The manual clearly outlines the data requirements, safety performance functions, regression to the mean phenomenon, Empirical Bayes methodology, and other aspects of network screening. For local agencies, especially in urban areas, intersections are […]

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Highway Safety Manual network screening

The Highway Safety Manual was developed by American Association of State Highway and Transportation Officials (AASHTO). It provides guidance and tools to conduct quantitative safety analyses alongside other transportation performance measures. Before the Highway Safety Manual engineers were limited in their ability to quantify safety impacts of project decisions due to a lack of an authoritative source and thus safety considerations were typically minimized in the decision making process. The Highway Safety Manual changed that and brought safety to the forefront of any operation decisions or transportation facility design. The manual is broken into four different sections: Part A – Introduction, Human Factors, and Fundamentals […]

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