Optimizing itineraries in public transportation with walks between rides

The authors study the problem of finding an optimal itinerary to travel from a starting location to a destination location using public transport, where they allow travelers to alternate rides with (short) walks. The main difference with previous research is that we take all possible walks that a traveler can make into consideration. This large number of possible walks poses a potential computational difficulty. However, in this paper the authors derive theorems for identifying a small subset of walks that only need to be considered. These results are embedded in a solution algorithm, which is tested in a real-life setting for bus transportation in a medium sized city. An extensive numerical study leads to encouraging results. First, only 1% of all possible walks needs to be considered, so that the optimal itinerary can be determined very efficiently. Second, allowing walks has considerable benefits; reducing the travel time in about 6% of all randomly generated examples by more than 10% on average.


  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 01493617
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Sep 16 2013 11:46AM