The frightening footage shows the barrier over Grove Park level crossing lowering and the warning lights flashing, as the pedestrians completely ignore the signals and cross.
Network Rail and BTP have now had to issue a fresh warning to Chiswick residents, warning them not to take the risk.
Route managing director of Network Rail, Becky Lumlock, said: “There's no excuse for this kind of reckless behaviour.
“Trains go over this stretch of line at up to 60mph, and once the barriers are down that means a train is imminently approaching.
“A trip or a stumble while trying to run across is all it would take, and the train driver wouldn't have enough time to stop.
“I'd like to urge anyone who uses level crossings to do so safely, and please don't ever be tempted to cross when a train is approaching.
“Please think about your own safety, and the impact that it could have on your families and the train driver.
“It really isn't worth the risk.”
Network Rail have closed over 1,000 level crossings
Grove Park level crossing is used by 172 trains a day.
As part of the Railway Upgrade Plan, Network Rail is trying to improve the safety of level crossings, including closing over 1,000 in recent years.
Network Rail has also reissued level crossing safety advice in the wake of this footage being released.
Inspector Becky Warren, from British Transport Police, said: “Despite our constant warnings about using crossings safely and the dangers of the railway, incredibly some people are still willing to put their lives on the line by ignoring crossing instructions, not looking properly or by trying to dash across crossings when trains are approaching.
“This footage is frightening to watch as this quick jump across the barriers could have killed him.
"It is difficult to understand why he would take such a risk but I hope he never does it again.
“As a police officer, I have had to deliver messages to families that their loved one has been killed by a train at a level crossing.
“Please, think and never take the risk.”
When using level crossings, Network Rail advises pedestrians to:
- Look both ways and cross only when it is safe to do so.
- Pay attention to barriers and warning lights.
- Don’t use mobile phones while crossing, as these can distract your attention.
- Take out your headphones; trains will often sound their horns to let pedestrians know that they are approaching.
Walk, don’t run.
Keep up to date with the latest news in west London via the free getwestlondon app.
You can even set it to receive push notifications for all the breaking news in your area.