On most standard commuter and high-speed trains (like the Shinkansen in Japan, TGV in France, or Amtrak in the US), passengers do not wear seatbelts. This is primarily because trains are among the safest modes of transportation, and the physics of a train collision differ significantly from car accidents. Because trains have massive weight and travel on a fixed, dedicated track, they do not experience the sudden, violent swerving or rapid decelerations that require the restraint of a belt. In fact, research suggests that in the event of a train derailment, being "pinned" to a seat by a belt could actually be more dangerous than being thrown clear, as it might lead to crush injuries from the train's heavy internal structure. However, there are exceptions: some specialized tourist trains, heritage rail lines, and certain long-distance coaches that operate on mixed rail/road systems may provide them. Additionally, many modern trains focus on "passive safety" features, such as impact-absorbing seats and tables with rounded edges, rather than active restraints like lap or shoulder belts.