NAP uses 2.3 version of DATEX II protocol. Only available elements of the standard have been used in NAP. Extension mechanisms have not been used. Detailed information about protocol is available at link to the page A discussion forum with information about the standard is available on the website.

NAP processes the following categories of difficulties in accordance with the Commission Delegated Regulation (EU) NO.886/2013 of 15 May 2013 Detailed information is provided below:

Categories of difficulties
SRTI Main-Topic SRTI Sub-Topic
Temporary Slippery Road Flooding
Danger of aquaplaning
Surface water hazard
Slippery road
Mud on road
Loose chippings
Oil on road
Petrol on road
Black ice
Snow drifts
Icy patches
Animal/people/obstacles/debris on the road Objects on the road
Shed loads
Fallen trees
Animals on the road
People on roadway
Children on roadway
Cyclists on roadway
Large animals on roadway
Herds of animals on roadway
People throwing objects onto the road
Broken down vehicles
Broken down vehicles
Unprotected accident area(s) Unprotected accident area(s)
Short term road works Clearance work
Maintenance work
Slow moving maintenance vehicle(s)
Road marking work
Reduced visibility Visibility reduced
Smoke hazard
Dense fog
Patchy fog
Blowing snow
Low sun glare
Wrong-way driver Vehicle(s) on wrong carriageway
Unmanaged blockage of a road Blocked
Bridge blocked
Tunnel blocked
Exit blocked
Connecting carriageway blocked
Entry blocked
Exceptional weather conditions Heavy snowfall
Heavy rain
Storm force winds
Strong winds
Strong winds affecting high-sided vehicles
Other obstacles Vehicle with overwide load
Heavy traffic
Damaged road surface
Other damages
Other situations


In the NAP (KPD) the communication exchange between Data Providers and Data Receivers will be implemented using the Communication Interface. The Communication Interface will handle communicates in the Datex2 format. Below you will find a file to download with sample messages: