Methodology for determining level of service categories using attitudinal data

Samer M. Madanat, Michael J. Cassidy, Wan Hashim Wan Ibrahim

Research output: Contribution to journalArticlepeer-review


Level of service (LOS) is standard terminology used for characterizing the operational quality of a transportation facility as perceived by the user of that facility. Given that transport systems are commonly designed and operated to maintain a specified LOS, it is a matter of some concern that the measures of effectiveness currently adopted for assessing LOS, as well as the threshold values for partitioning LOS designations, have been established subjectively. A methodology for partitioning LOS designations by using an ordered probit model calibrated with attitudinal data collected by transportation 'users' is described. The application of this methodology is demonstrated by using survey data of bus riders. The basic approach, however, can be applied to all types of transportation facilities.

Original languageEnglish (US)
Pages (from-to)59-62
Number of pages4
JournalTransportation Research Record
Issue number1457
StatePublished - Dec 1994

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Mechanical Engineering


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