Glossary of Data Variables for Fatal and accident causation ... - ERSO

Work package 5 Database Glossary
4.4 Road Level Data Back to top
# Variable Value Notes
R51 Carriageway type 1 = Two way traffic divided by a painted line
The roadway is split with a painted line or hatchings only and traffic flows in both directions.
2 = Two way traffic with no division markings
3 = Physically divided roadway without traffic
barrier
4 = Physically divided roadway with traffic
barrier
5 = One-way traffic
The road is 2 way but there are no markings dividing up the road surface. This is often
found in rural areas where the road is too narrow to divide up.
There is a tactile division between the traffic flows which is not a specialist traffic barrier. An
example is a roadway divided by a grass verge, hedge or low kerb.
The division of 2 way traffic is made by some sort of specialist traffic barrier, for example
metal ‘Armco’ barrier or concrete alternative.
The traffic on the roadway flows in one direction only. This includes roundabouts.
-888 = Other
-999 = Unknown
R52 Number of lanes 2 digit numeric The number of lanes is the total number of driving lanes on the stated vehicle’s side of the
road, not both sides.
Bus lanes are included. Turning, filter and cycle lanes are not included. Collisions occurring
on roundabouts should be coded as the number of lanes going around it.
R53 Motorway 1 = Yes
2 = No
A road with divided carriageways AND grade separated junctions, often at least TWO lanes
in each direction. This definition differs throughout the EU and should therefore be coded
depending on each countries classification.
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