339. The driver of a bus, a minibus or a road vehicle equipped for the transport of dangerous substances must always stop his vehicle not less than five metres from a level crossing; after ascertaining that he may cross it in safety, he may set his vehicle in motion again.
The Government may, for all level crossing on an autoroute in which the roadways are separated by a median strip or by any other raised physical separation, or for certain of such crossings specifically identified, exempt the driver from the requirements of this section.