Photo credits

The photographs on this site come from Wikimedia Commons and are used under the licenses listed below.

• Ship

  Author: Arizonaman1

  License: CC0 1.0

  Source

• Aircraft

  Author: UzeyirMikayil

  License: CC BY 4.0

  Source

• Truck

  Author: Destroducks

  License: CC BY-SA 4.0

  Source

• Train

  Author: Rob Dammers

  License: CC BY 4.0

  Source