nRoland Perry typed:
In message , at
21:33:43 on Mon, 28 Nov 2005, Richard J.
remarked:
So there is the possibility of stretches of 599m of lit road where
the limit is still NSL, without any repeaters being required.

But the guidelines do say that for lit stretches of 600m or more, the
first and last repeaters should be not more than 450m from the
start/end of the lit section, so it would be reasonable to expect at
least one repeater in a lit section of more than 450m.

Yes, if the lit section is more than 600m. Especially if you are new
to the area, you may not know how far the lights go.

No, what I mean is that it would be reasonable to apply the "first
repeater within 450m" rule for lit sections of between 450 and 600m as
well as for those of 600m.

However, the guidance is poor in my view. I much prefer the French
practice of often putting several repeater signs close together just
after the start of the limit, which leaves you in no doubt what the
limit is. In Britain, if you miss the initial sign,

Which initial sign is that? We are mainly talking about isolated
stretches of lit road (whether they be thorough a village, or merely
adjacent to a junction) where there's no sign at the start of the lit
section.

In which case the previous limit still applies. Where the limit
changes, they should sign it properly, and it stays in force until the
next limit change. If there's likely to be any doubt, put in extra
repeaters as necessary. But all this stuff about street lights and
whether they are close enough together is not helpful. (I mean the DfT
rules are unhelpful, not your discussion of them.) It's led to ludicrous
rules like it being illegal to put up 30mph repeaters in a lit street
unless there is a speed camera within 1km.
--
Richard J.
(to e-mail me, swap uk and yon in address)