In an effort to reduce Motor Vehicle Accidents that involve Fatalities and/or Severe Injury, the Chattanooga Department of Transportation and the Police Department have teamed up to identify trends in MVAs and what evidence based treatments they can do to help prevent them.   CDOT can work to implement traffic calming, access to sidewalks/bike lanes, and improved lighting in areas where MVAs occur; and CPD can work to implement targeted enforcement, community awareness campaigns, among other initiatives.

CDOT and CPD are measuring Pedestrian, Bicycle, and Vehicle fatalities in an attempt to collaboratively reduce instances of fatal accidents.  Though this is a difficult goal, the overall idea should still be continually pushed as fatal incidents are an avoidable tragedy and a significant cost to society both emotionally and fiscally.   The below numbers are cumulative counts of fatal vehicle incidents, not total fatalities.  One fatal incident may include multiple fatalities, but it will still only be counted as one.

The map below shows all Multi Vehicle MVAs occurring the current fiscal year.  Areas in red indicate a high frequency of MVAs, but the intersection of Amnicola and Wisdom contains incorrect data to to reporting errors setting the address of the incident at the police station.  As expected, many MVA occur downtown and on major roadways.

The map below shows all Single Vehicle MVAs occurring the current fiscal year.  Areas in red indicate a high frequency of MVAs, but the intersection of Amnicola and Wisdom contains incorrect data to to reporting errors setting the address of the incident at the police station.  Based on the map, there seems to be a high rate of single vehicle accidents around the ridge-cut and I-24/I-75 split among other locations.

The map below shows Serious Injury and Fatality MVAs the the past year since today.  Selecting each dot will provide further information on the incident.  

To the right, a simple pie chart shows 40% of fatal vehicular incidents involved alcohol.  Alcohol usage significantly impacts a drivers ability to see, react in time, coordinate, concentrate, among many other impairments thereby leading to an increased risk of being involved in an incident.

The below chart shows peak accident times for the past year since today.  Peak times are from 3pm to 6pm.  Overall, weather does not seem to have too much of a significant effect in regards to day or night.  Select filters below to drill down deeper.

The below chart shows the impact speed and weather can have on incidents.  The speed is only the posted speed limit, as it is not possible most of the time to know the actual speed of the vehicle involved.

It's also important to understand where these accidents are occurring based on the ZIP code location of driver 1.  This way, we can see if there are trends in where at fault driver's from ZIP codes are driving.  The default to the right is set to the highest number of incidents by ZIP code, which is 37421; but clicking the drop down, other ZIP codes can be chosen.  For all ZIP Codes, it appears a majority of incidents occur within the ZIP code, as is expected.