moment cyclists dodged the safety barriers at a level crossing to race through the path of a speeding train track .
but as the barriers came down to signal a train was passing through , the racers can be seen swerving to avoid them in a desperate attempt to gain seconds on their rivals - and putting their lives at risk .
a policeman on a motorbike pulls up to take charge of the situation and stop more cyclists risking their safety for the last time for team sky .