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

Work package 5 Database Glossary
# Variable Value Notes
-888 = Other
-999 = Unknown
R68 Light condition 1 = Daylight
The light during daytime.
R69 Traffic Flow
2 = Partial light
3 = Darkness
4 = Darkness with artificial light
5 = Dazzling sunlight
-888 = Other
-999 = Unknown
1 = Heavy traffic flow
2 = Normal traffic flow
3 = Light traffic flow
-999 = Unknown
Either dusk or dawn, when it is not complete daylight or darkness.
Time of day once the sun has officially set and there is no lighting infrastructure present.
Official night time but with lighting present such as street lamps that are fully switched on.
If street lamps are present but not working or not turned on code as ‘Darkness’ if it is after
dusk.
If light conditions at the accident scene, such as in tunnels, reflects that of darkness or
darkness with artificial lights then this should be coded.
Sunlight that directly shines into the eyes of the road user, which could have impaired vision.
What was the traffic flow like at the time of the accident Fairly subjective responses, based
on opinion in the police reports, time of day and road type
Heavier than normal traffic flow – may result in congestion, queues, slow moving traffic.
Normal/average traffic flow, e.g. moving at speed limit.
Below average traffic flow.
The traffic flow at the time of the crash is unknown.
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