All of the automatic bollards I've seen are very clearly signed, and frequently have lights indicating their presence. It is very rare that they are not very ob

All of the automatic bollards I've seen are very clearly signed, and frequently have lights indicating their presence. It is very rare that they are not very obvious. In any case, if you are following another vehicle so closely that you cannot see a hazard in the road in front of you, it is your fault for hitting that hazard (by law in most places).