Road planning

This LAP indicates if hydrogen has to follow specific requirements when transported, and if the regulations are different from the transport of other types of gas. It identifes the competent authorities to allocate the routes.


Road Planning provide the municipalities with a clear understanding of the maximum risks that the transport of hazardous substances may cause. Baseline goals are: Transport hazardous substances between major industrial sites and abroad, including in the future, keeping risks for locals along the routes within legal limits, provide clarity to municipalities about what may / may not be built.

Pan-European Assessment:

Hydrogen is considered as any other flammable gas or dangerous good for its transportation. The Agreement of transport of Dangerous Goods by Road applies.
Is it a barrier?
Assessment Severity
The transport of hydrogen must be in concordance with European Agreement concerning the International Carriage of Dangerous Goods by Road (ADR)


Question 1 Are there any specific regulations or restrictions on the road transport of hydrogen? A) Does hydrogen have to follow specific requirements when transported? (e.g. specific types of roads, specific route)
The transport of dangerous goods is regulated by ADR throughout Europe. ADR prescribes that dangerous goods must be transported as much as possible via big roads and only if that is not possible via the secondary roads. NO prior information to the authorities is required. Hydrogen is no exception compared to other dangerous goods.
Question 1 Are there any specific regulations or restrictions on the road transport of hydrogen? B) Please specify the requirements regarding tunnels, bridges, parking, others
Tunnel restrictions: Route possibilities using tunnels depends on design and size of transport container – bulk or bottled. ADR requires tunnels to be classified according to risk, with no restrictions for category A and a prohibition for nearly all dangerous goods in category E. In Belgium there are 7 tunnels with classification E, 2 with D and 1 with C. Trucked compressed gaseous hydrogen can pass class A tunnels at any time, in class E they cannot pass. The ADR imposes rules for the security of the transport and has prescriptions related to the parking of trucks loaded with dangerous goods.
Question 2 Which authorities are competent to allocate the routes? (and at what level: national, local?)
ADR rules shall be applied. However, it can be possible that locally traffic signs are installed to forbid that trucks with dangerous goods may pass certain roads. The ADR authorities are competent to allocate routes. In Belgium the ADR authorities are divided into three groups (one for the Flemish region; one for the Walloon region; one for the Brussels region). In Flanders the cell ADR is part of the Department Mobility and Public Works.
Question 3 Are the regulations differing from the transport of other types of gas?
ADR prescribes codes for tunnels for all dangerous goods and hence also for hydrogen. See also the national derogations from ADR, as explained here above.
Describe the comparable technology and its relevance with regard to hydrogen
Road transport of any gases (see ADR)

National legislation:

EU Legislation: