Storey's Way width restriction

Windsor Road has a narrow section at its western corner, supported by article 43(3) of the City of Cambridge Area H (Consolidation) Order 1993. This bans vehicles over two metres wide from preceeding beyond the corner in either direction. Like the similar restriction on Windsor Road, the signage of this restriction is a little unusual.

On Huntingdon Road, on the approach to Oxford Road, there are two signs apparently warning of the width restriction. They appear to be width restriction signs to diagram 629 with distance plates to diagram 573. This is not a prescribed combination – in general diagrams 572 and 573 may only be used with warning and informatory signs because regulatory signs are only placed where the restriction actually begins.

The correct sign for this circumstance is diagram 818.3, which can be varied to show the required information, as demonstrated here on Madingley Road.

Of course, it wouldn't do for a sign to be entirely right. As with all signs showing distances in yards, TSR Schedule 16 item 6 the distance should be rounded to the nearest ten yards.

At the north end of Storey's way, there's another sign to diagram 629, this time with no plate, suggesting (incorrectly) that the restriction starts there.

On Storey's Way itself, there are signs about 70 metres from each end of the restricted section: one to diagram 629 (without a plate) and one to diagram 517 (road narrows on one side). The sign to diagram 629 is wrong (again) since it should be at the point of restriction, rather than 70 metres away. The proper sign to give advance warning of the width restriction would be another variant of diagram 818.3 (placed below the triangular sign rather than above it).

Finally, where the width restriction actually applies, there are no signs to diagram 629 at all, whereas there should be a pair facing each way.