Modern trains are "very fast" and "often surprisingly silent" warned the British Transport Police.
Chief Superintendent Miles Flood was speaking as part of a campaign to prevent people from crossing the tracks, after 41 people died trespassing on Britain's railways last year.
Billions of pounds have been invested to give us a fast, modern rail network. Trains are very fast and often surprisingly silent, particularly if you are not paying attention.
We spend thousands of police hours combating trespass to keep people safe and minimise disruption to the network. If this campaign can prevent one British Transport Police officer having to tell someone that their loved one has been killed or maimed, it will be worth it.
– Detective Chief Superintendent Miles Flood, British Transport Police
British Transport Police have confirmed that one person has died after a train hit a car on a level crossing in Somerset. It happened near Athelney, which is on the line between Taunton and Castle Cary.
There were no reports of any passengers on the train being injured in the crash.
The car is trapped under the front of the train and services are stopped in the area. First Great Western is operating replacement buses between Taunton and Westbury.
From today, rail passengers will be able to report incidents via their mobile phones, as a new text number is launched by British Transport Police.
Travellers will be able to use the 61016 number to report anti-social behaviour, similar to the 101 non emergency numbers used by the police.
The number, which will be monitored around the clock, has the capacity to send police if required.
BTP deputy chief constable Paul Crowther said: "We hope that the ease of being able to send a quick text message will encourage more passengers to report incidents when they occur. By building up a more accurate picture, we can better focus our resources."