Due to limitations of the network coverage (poor satellite and data reception), there is usually little to no signal underground. Hence, the location of the vehicle may be inaccurate and the last updated location of the vehicle will be shown instead. However, once the signal improves, the current location of the vehicle will be updated. 

Other limitations of GPS include:

  • Inside a large building or mall
  • A tunnel
  • A subway
  • Wooded ravine / Dense foliage
  • Telecommunication interference
  • Signal jammer