Netherlands

City: 
Breda
Facilities: 
A16
Facility Type: 
motorways
Length of Controlled Section: 
12km
Objectives: 
promote safer driving during fog
Conditions: 
visibility sensors determine the intensity of fog at all times
Date Implemented: 
1991
Other Information: 
the originally stand alone system was integrated in the MTM system in 1992
Operational Information
Concerned Vehicles: 
all
Type of Control: 
automated
Speed Information
Speed Variability: 
as visiblity drops to 140/70 m the posted speed goes 80/60 km/h and for an incident the first upstream sign will post 50km/h and the next will be set at 70km/h
Maximum Speed: 
100 km/h
Traffic Control Devices
Speed Signs: 
every 700-800m
ITS: 
visibility sensors, automatic incident detection
Performance Measures
Operational Effectiveness: 
after installation speeds during fog were reduced by 8-10km/h
Lane Speeds: 
One speed limit for all lanes