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T.P.D.M. V.2.5<br />

(Al/2002)<br />

(vii) Within 25m of the nearest part of a structure over a road of which any part is 6.5m or less<br />

above the surface of the carriageway.<br />

(viii) Within 20m of any fire hydrant positioned along the footway of the road.<br />

(ix)<br />

(x)<br />

(xi)<br />

Where street lighting which operates throughout the hours of darkness is not available, and<br />

preferably a lighting column should be within 5m of any hump.<br />

Opposite any run-in, or any position where they might interfere with access to the run-in.<br />

Over any manhole cover, or where they might interfere with access to public utility<br />

apparatus.<br />

(xii) On or within 25m of any road carrying structure, such as a bridge, subway or culvert, in<br />

order to avoid the risk of structural damage occurring because of the increase in impact<br />

loading and vibration.<br />

(xiii) In or within 25m of any tunnel,<br />

(xiv) Within 20m of any parking place.<br />

(xv) Within 20m of a bus stop sign or within 10m of the bus stop road markings 1047 and<br />

1048, or the public light bus or taxi stand marking 1049.<br />

(xvi) Within 20m of the summit of a gradient of more than 10%.<br />

5.4.3.8 Road humps should not normally be installed on roads forming part of a public transport route,<br />

because of the possible delay and discomfort caused to passengers. However if it is agreed after<br />

consultation with the appropriate public transport company or companies to install road humps,<br />

the height of any road hump should not be greater than 75mm.<br />

5.4.3.9 It is generally advisable, in order to ensure vehicle speeds are not excessive when approaching a<br />

road hump, that the road where humps are installed incorporate wherever possible one or more of<br />

the following features:<br />

(i)<br />

Vehicles enter the road through a junction where they have to change direction by not less<br />

than 70 degrees with an inner turning radius of not more than 25m.<br />

(ii) There is a bend along the road which changes the direction of vehicles by not less than 70<br />

degrees with an inner kerb radius of not more than 25m.<br />

(iii)<br />

(iv)<br />

(v)<br />

(vi)<br />

The road is a cul-de-sac.<br />

Access is restricted to certain types of vehicles only.<br />

The road does not provide a through route between major roads.<br />

Side road junctions along the humped road are generally at right angles to the humped<br />

road.

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