Ramp slabs for 30 km speed limit zone
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Standard NF P 98300
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Traffic calming measures can be used
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- either in a "30 km limit" on roads within the limit or at the edge of the limit
- or on a section of road where there is a local speed limit of 30 km/h
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2 types of traffic calming measures
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Classic speed hump type
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'Flat top' type
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Installation of a "Flat top" type of speed hump
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- its lengthways cross section shows the raised flat area and 2 slopes on either side.
- Its geometrical characteristics are as follows:
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ramp slope from 7 to 10 %
height of flat area - 10 cm - accurate to within +/- 1cm
length of flat area - between 2.50m and 4.00m
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To be laid on repairing cement or a stabilised sand mix
Allow space between slab joints for expansion (5mm)
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