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MTA’s Accident Mapping System
7/28/2017
Leo Fothergill, GIS Project Manager AECOM (consultant to MDOT MTA) Woon Kim, Senior Analyst AAA Foundation for Traffic Safety (former MDOT MTA employee)
Agenda
Maryland Transit Administration (MTA) Overview Accident Mapping System Need System Features & Functionality Uses/Effectiveness of System Questions/Comments
Maryland Department of Transportation Maryland Transit Administration
Fourteenth Largest Transit Agency in the US Over 110 Million Passenger Trips Annually
Accident Mapping System Need Over 700 buses + 38 light rail vehicles + congested
Baltimore City streets Accidents
4
Accident Mapping System Need (cont’d)
In 2012 Bus Accident Mapping System was launched to visualize where bus accidents were occurring.
5
Accident Mapping System Need (cont’d)
In 2016 Accident Mapping System was launched with various enhancements.
Accident Mapping System
Light Rail & Metro
Accidents/ Incidents
Claims Cost Data
Supervisor Zones
Expanded Data
Querying Interactive Charting
Tool
Export to CSV
Improved Reporting
Intranet-based web mapping application. Accident Mapping System includes over ten years of
accident GIS data (January 2007 – June 2017) and six months of claims data.
Accident Data Services created using ArcGIS Server. Built using Leaflet js library- flexible, lightweight. D3 used for charts, accident points and clustering. Redux – a data storage/processing library. Optimized for large data sets.
Accident Mapping System
Accident Mapping System
Transit Modes – Bus, Light Rail, and/or Metro
Bus Departments – Division or Mobility Provider
Date
Preventability – Preventable and Non-Preventable
9
Accident Mapping System (cont’d)
Accident Codes (Over 200 different codes)
Bus Routes
Bus Model Year Supervisor Zone Keyword
– Using keywords in accident description to query data.
10
Accident Mapping System (cont’d)
11
Accident Mapping System (cont’d)
12
Accident Mapping System (cont’d)
Dynamic link to Google Street View
Accident Mapping System (cont’d)
Supervisor Zone Based Clustering
Color-coded by Mode, Color
intensity shows frequency level
Mode Selection
Mode specific data layers
Mode Selection
Accident Mapping System (cont’d)
Location Specific Reports
Accident Mapping System (cont’d)
Interactive and compound charting
Uses/Effectiveness of System
Bus Accidents ‘Hot Spot’ Report & Posters – communicate via
outreach to Bus Divisions and Training Dept. for raising awareness and reducing accidents
Uses/Effectiveness of System
33
Baltimore Fort McHenry Tunnel Toll Plaza
Before (2011 & 2012)
Uses/Effectiveness of System
24
two steel I-beam roof support columns & insufficient
clearance width
133’’─ 124’’= 9’’
Make operators aware of the likelihood of the accident
Alert them to reduce speed upon entering the toll plaza
Restrict them from using narrow lanes
2
Uses/Effectiveness of System
13 10 2
2013/14 2015/16 2017YTD
After (2017)
Light Rail Accidents – Collisions along the LR
corridor on Howard St. in CBD of Baltimore City
– Mixed traffic, narrow and one-way roads, high volume of pedestrians, faded lane marking, etc.
– A tool to prioritize the locations for rigorous traffic study and safety assessment
Uses/Effectiveness of System
Questions/Comments
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