Typically the '''barriers''' on the approach side to the crossing are lowered first with those on the exit side following shortly after. The [[sequence]] [[timing]] is set to allow enough time for a vehicle or [http://en.wikipedia.org/wiki/Pedestrian pedestrian] on the crossing to exit before the exit barriers come down. There are no examples of these in the UK. All full barrier level crossings in the UK are manually operated and not automatic. | Typically the '''barriers''' on the approach side to the crossing are lowered first with those on the exit side following shortly after. The [[sequence]] [[timing]] is set to allow enough time for a vehicle or [http://en.wikipedia.org/wiki/Pedestrian pedestrian] on the crossing to exit before the exit barriers come down. There are no examples of these in the UK. All full barrier level crossings in the UK are manually operated and not automatic. |