City Enables Spatial Analysis for Traffic Safety Improvements with Intergraph GeoMedia® Software


The City of Edmonton in Alberta, Canada, was one of the first cities to have all its data in digital format, making that transformation in the 1970s. Since then, Edmonton has seen great success with geospatially enabling its departments to perform tasks faster and smarter using map-based data. Edmonton wanted to match this success in its Office of Traffic Safety.

Edmonton’s Office of Traffic Safety (OTS) was established in 2006 as the first municipal office of traffic safety in North America. This department supports national and provincial traffic safety targets to help reduce traffic collisions and create safer streets for drivers and pedestrians. On average, Edmonton experiences approximately 25,000 traffic collisions each year, costing the city and its citizens more than half a billion dollars in collision repairs. This made finding a solution a top priority. 


  • Reduce traffic collisions on
  • municipal roadways
  • Recognize the daily patterns of high-risk locations and drivers with enhanced mapping utilizing collision data and automated photo enforcement data
  • Improve education, engineering, and enforcement initiatives through advanced collision data analysis
  • Enhance intelligence for
  • Edmonton Police Service’s deployment of resources


Edmonton has a long-standing relationship with Intergraph®.

Previously, the city teamed with Intergraph to develop a Spatial
Land Inventory Management (SLIM) application for GIS data. The SLIM system, built on Intergraph GeoMedia® products, enables its municipal departments to share geospatial data easier and faster, and better communicate with the general public.

With the SLIM system already in place, OTS can process, analyze, and report on traffic safety data (e.g., collisions, traffic volume, vehicle surveys, automated enforcement cameras, road geometry and classification, and licensed liquor premises). These new capabilities include geocoding, spatial pattern identification, spatial correlations, and target locations best suited for safety improvements.

To enhance its geocoding capabilities, OTS created a reference system to consistently code collisions to the same location and use street names to create unique reference points. Before implementation, police collision reports had inconsistent location descriptions (e.g., referencing a street with two different names). This made it difficult for traffic safety analysts to determine where best to concentrate its efforts for roadway improvements.

With a new solid geocoding structure, OTS can now effortlessly create maps based on collision frequency, which are regularly requested from the Edmonton Police Service. These maps give police a quick and easy-to-understand overview of where the worst traffic areas are, helping them determine where to focus traffic squads. “These maps, which serve as a quick reference to the most serious collisions of the year, would normally take us hours to create,” stated Brandt Denham, GIS Analyst, Office of Traffic Safety at the City of Edmonton. “With the locational referencing system offered by GeoMedia, we can now create a visual map in minutes that the Edmonton
Police Service can easily understand
and act upon.”

Most of OTS’ mapping and analysis needs are based on collision frequency, but typical frequency readings do not take other variables into account, such as traffic volume and road length. Edmonton wanted to use a sophisticated statistical approach (the Empirical Bayes method), that can factor in these variables to better prioritize areas on the roadways that need more attention. Using GeoMedia, OTS is now able to perform this type of analysis by spatially integrating traffic volume,
road characteristics, speed data, and collision locations.

OTS also utilizes an evidence-based speed management continuum to educate, enforce, and engineer speed-related initiatives. Speed surveys and advanced statistical methodology help prioritize deployment of its automated photo enforcement assets. With the SLIM system, OTS creates maps that depict speed-related activities activities, such as surveys, enforcement sites, speed limits on roadways, the location of schools and playgrounds, and other relative spatial data. Strategic, tactical, and operational mapping can be used to show trends in high-risk drivers, top locations for speed violator non-compliance, over-representation of collisions, and hotspots for selected priorities, such as impaired drivers. These maps provide valuable intelligence and data for OTS to make smarter decisions concerning its roadways.

“GeoMedia is a critical analytical tool that helps us allocate our limited resources to where they will make the biggest impact on collision reductions,” continues Denham. “Edmonton’s collision reduction of 38.9 percent saved the city nearly C$781 million dollars in six years.”


In the future, Edmonton’s OTS plans to incorporate weather factors into its predictive analysis methods to further strengthen the capabilities of its SLIM system and enhance traffic safety.



Intergraph Corp.

Intergraph is the leading global provider of engineering and geospatial software that enables customers to visualize complex data. Businesses and governments in more than 60 countries rely on Intergraph’s industry-specific software to organize vast amounts of data to make processes and infrastructure better, safer and smarter. The company’s software and services empower customers to build and operate more efficient plants and ships, create intelligent maps, and protect critical infrastructure and millions of people around the world.

Intergraph operates through two divisions: Process, Power & Marine (PP&M) and Security, Government & Infrastructure (SG&I).  Intergraph PP&M provides enterprise engineering software for the design, construction, operation and data management of plants, ships and offshore facilities. Intergraph SG&I provides geospatially powered solutions, including ERDAS technologies, to the public safety and security, defense and intelligence, government, transportation, photogrammetry, and utilities and communications industries. Intergraph Government Solutions (IGS) is a wholly owned subsidiary of Intergraph Corporation responsible for the SG&I U.S. federal business.

Intergraph is part of Hexagon (Nordic exchange: HEXA B;,
a leading global provider of design, measurement and visualisation technologies that enable customers to design, measure and position objects, and process and present data. For more information, visit and

Intergraph Corp.
Jason Sims
Geospatial Operations
(770) 776-3400
19 Interpro Road
Madison, AL 35758, USA

» Back to our Aerial Mapping Fall '13 Issue

Website design and hosting provided by 270net Technologies in Frederick, Maryland.