Regularity of Trains in Ile de France: What Does It Mean to Users?

One important cause of dissatisfaction among travelers is the irregularity of commuter trains. This article summarizes findings from a study conducted by the organizing authority for transportation in Ile de France regarding ways to increase the reliability of urban railroads in the region. Data on irregularity from two state-owned train services in the region were analyzed in relation to time of day, day of the week, month of the year and train route. A stated preference study was also conducted to identify passengers' perceptions of regularity. A table of parameters enabling an evaluation of the usefulness of a journey according to segment (reason, direction, regularity) and characteristics (duration, occurrence of short delays, long delays, comfort, and level of information) is developed so that hypothetical situations can be compared with the current one, and improvements in regularity can be assessed. Findings highlight the cumulative effect of irregularity during peak hours and throughout the day. The effects of irregularity seem to be felt as soon as the evening peak hours begin. A simulated application showed that reducing the rate of irregularity of an urban railway from 15% to 10% would result in a unit time gain of 4 minutes 40 seconds. In the case of a route used by 30,000 people during the morning peak hours traveling in the busiest direction and by the same number traveling during the evening peak hours, the result could be an annual regularity gain of EUR 15 million.

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  • Authors:
    • Debrincat, Laurence
    • Goldberg, Jonathan
  • Publication Date: 2007-2


  • English

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  • Accession Number: 01049689
  • Record Type: Publication
  • Files: TRIS
  • Created Date: May 13 2007 11:25PM