---
_id: '7216'
abstract:
- lang: eng
  text: 'We present LiveTraVeL (Live Transit Vehicle Labeling), a real-time system
    to label a stream of noisy observations of transit vehicle trajectories with the
    transit routes they are serving (e.g., northbound bus #5). In order to scale efficiently
    to large transit networks, our system first retrieves a small set of candidate
    routes from a geometrically indexed data structure, then applies a fine-grained
    scoring step to choose the best match. Given that real-time data remains unavailable
    for the majority of the world’s transit agencies, these inferences can help feed
    a real-time map of a transit system’s trips, infer transit trip delays in real
    time, or measure and correct noisy transit tracking data. This system can run
    on vehicle observations from a variety of sources that don’t attach route information
    to vehicle observations, such as public imagery streams or user-contributed transit
    vehicle sightings.We abstract away the specifics of the sensing system and demonstrate
    the effectiveness of our system on a "semisynthetic" dataset of all New York City
    buses, where we simulate sensed trajectories by starting with fully labeled vehicle
    trajectories reported via the GTFS-Realtime protocol, removing the transit route
    IDs, and perturbing locations with synthetic noise. Using just the geometric shapes
    of the trajectories, we demonstrate that our system converges on the correct route
    ID within a few minutes, even after a vehicle switches from serving one trip to
    the next.'
article_number: '8917514'
article_processing_charge: No
author:
- first_name: Georg F
  full_name: Osang, Georg F
  id: 464B40D6-F248-11E8-B48F-1D18A9856A87
  last_name: Osang
  orcid: 0000-0002-8882-5116
- first_name: James
  full_name: Cook, James
  last_name: Cook
- first_name: Alex
  full_name: Fabrikant, Alex
  last_name: Fabrikant
- first_name: Marco
  full_name: Gruteser, Marco
  last_name: Gruteser
citation:
  ama: 'Osang GF, Cook J, Fabrikant A, Gruteser M. LiveTraVeL: Real-time matching
    of transit vehicle trajectories to transit routes at scale. In: <i>2019 IEEE Intelligent
    Transportation Systems Conference</i>. IEEE; 2019. doi:<a href="https://doi.org/10.1109/ITSC.2019.8917514">10.1109/ITSC.2019.8917514</a>'
  apa: 'Osang, G. F., Cook, J., Fabrikant, A., &#38; Gruteser, M. (2019). LiveTraVeL:
    Real-time matching of transit vehicle trajectories to transit routes at scale.
    In <i>2019 IEEE Intelligent Transportation Systems Conference</i>. Auckland, New
    Zealand: IEEE. <a href="https://doi.org/10.1109/ITSC.2019.8917514">https://doi.org/10.1109/ITSC.2019.8917514</a>'
  chicago: 'Osang, Georg F, James Cook, Alex Fabrikant, and Marco Gruteser. “LiveTraVeL:
    Real-Time Matching of Transit Vehicle Trajectories to Transit Routes at Scale.”
    In <i>2019 IEEE Intelligent Transportation Systems Conference</i>. IEEE, 2019.
    <a href="https://doi.org/10.1109/ITSC.2019.8917514">https://doi.org/10.1109/ITSC.2019.8917514</a>.'
  ieee: 'G. F. Osang, J. Cook, A. Fabrikant, and M. Gruteser, “LiveTraVeL: Real-time
    matching of transit vehicle trajectories to transit routes at scale,” in <i>2019
    IEEE Intelligent Transportation Systems Conference</i>, Auckland, New Zealand,
    2019.'
  ista: 'Osang GF, Cook J, Fabrikant A, Gruteser M. 2019. LiveTraVeL: Real-time matching
    of transit vehicle trajectories to transit routes at scale. 2019 IEEE Intelligent
    Transportation Systems Conference. ITSC: Intelligent Transportation Systems Conference,
    8917514.'
  mla: 'Osang, Georg F., et al. “LiveTraVeL: Real-Time Matching of Transit Vehicle
    Trajectories to Transit Routes at Scale.” <i>2019 IEEE Intelligent Transportation
    Systems Conference</i>, 8917514, IEEE, 2019, doi:<a href="https://doi.org/10.1109/ITSC.2019.8917514">10.1109/ITSC.2019.8917514</a>.'
  short: G.F. Osang, J. Cook, A. Fabrikant, M. Gruteser, in:, 2019 IEEE Intelligent
    Transportation Systems Conference, IEEE, 2019.
conference:
  end_date: 2019-10-30
  location: Auckland, New Zealand
  name: 'ITSC: Intelligent Transportation Systems Conference'
  start_date: 2019-10-27
date_created: 2019-12-29T23:00:47Z
date_published: 2019-11-28T00:00:00Z
date_updated: 2023-09-06T14:50:28Z
day: '28'
department:
- _id: HeEd
doi: 10.1109/ITSC.2019.8917514
external_id:
  isi:
  - '000521238102050'
isi: 1
language:
- iso: eng
month: '11'
oa_version: None
publication: 2019 IEEE Intelligent Transportation Systems Conference
publication_identifier:
  isbn:
  - '9781538670248'
publication_status: published
publisher: IEEE
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'LiveTraVeL: Real-time matching of transit vehicle trajectories to transit
  routes at scale'
type: conference
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
year: '2019'
...