Assure accurate late train arrival forecasts in support of a Connection Protection system.
Experience of the Utah Transit Authority in implementing a Connection Protection program for rail-to-bus passenger transfers in Salt Lake City.
Some guidance from UTA's experience with implementing their Connection Protection system, specifically related to train arrival estimates and forecasts, include the following:
- For CP systems based on a train arrival forecast, seek to update train status and down stream forecasts frequently. This will complicate the process by requiring more frequent status checks, projections of revised arrival times, and notifications to bus operators. However, a presumption is that operators will be more likely to buy in and adhere to CP directives when "false" train delay messages are reduced through more frequent updating.
- For systems in which GPS-based train location information is available, feed accurate train location data into the CP algorithm in real-time on a frequent basis. Eventually, when Automatic Vehicle Location (AVL) systems are available on all the buses and trains, and location data shared in real-time, the CP algorithm can be applied with much greater precision, resulting in substantially improved performance and positive operator and customer satisfaction.
- Use historical performance data, where appropriate, to fine tune train arrival forecasts. These data might include accurate measures of variation in travel times between stations, loading time at each station by time of day and level of demand, and the ability of trains to make up late time in traveling between stations.
- Notify bus operators as soon as revised information contradicts an earlier issued CP "hold" message. While this would result in additional complexity to the system as noted above, it would be helpful to both the bus operators and the on-board passengers to receive notification either that required wait time has been reduced or that waiting is no longer required.
Efficient and accurate issuance of CP messages is expected to enhance customer satisfaction and encourage higher CP compliance by bus operators. A well-designed CP system can help achieve ITS goals to enhance efficiency, mobility, productivity and customer satisfaction. The application of a Connection Protection program in Utah has served as a useful tool that can help operators better meet the needs of their transit customers. The evaluation of this system identified the importance of accurate knowledge of both train and bus locations, and incorporating this information on a real-time basis into the CP algorithm.
Author: Jeffery Jenq, Chris Cluett, Ben Pierce and Alan Pate, Battelle
Published By: ITS Joint Program Office, U.S. Department of Transportation
Source Date: 5/12/2004
EDL Number: 14074
Other Reference Number: FHWA-JPO-05-005URL: http://ntl.bts.gov/lib//jpodocs/repts_te//14074.htm
Jeffery Jenq, Richard Hodges
Battelle, Hodges Transportation Consulting
Utah Transit Authority
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Intelligent Transportation Systems > Transit Management > Operations & Fleet Management > Service Coordination
Intelligent Transportation Systems > Transit Management > Transportation Demand Management > Dynamic Routing/Scheduling
Intelligent Transportation Systems > Transit Management > Operations & Fleet Management > Automatic Vehicle Location / Computer-Aided Dispatch
Intelligent Transportation Systems > Driver Assistance > Driver Communication > With Carrier/Dispatch
paratransit, demand-responsive transit, automated vehicle location, computer aided dispatch, automatic vehicle locator, AVL, CAD, AVL/CAD