Data underlying the publication: "Modelling Driver Expectations for Safe Speeds on Freeway Curves using Bayesian Belief Networks"

153 motorway curves in The Netherlands with the following variables:
dir	-	direction of the curve: left or right hand curve
prw	-	preceding roadway type: this includes the roadway types just before the curve
pcs	-	preceding curve speed: this shows the 85th percentile speeds on the preceding roadway (tangent refers to a tangent, so no speed restriction based on curvature)
ss	-	speed sign: shows which type of speed sign (advisory or speed limit) are in place just before the curve
cs	-	curve sign: shows wheter or not chevron signs are in place in the curve
a	-	curve angle: shows the angle group the curve is in gradians
ws	-	warning sign: whos wheter or not a warning sign is in pace before the curve
nl	-	number of lanes: shows the number of lanes in the curve
v85	-	85th percentile speed: shows the measured 85th percentile speeds in the curve
