In article said:Mike Causer said:Does anyone know the recommended width for a two-way shared use bridge?
It's in Highways Agency publication no. BD 29/03.
I've just been looking at a new farcility under construction that has a
bridge exactly 2m wide, with approach paths 1.8m wide.
http://www.sustrans.org.uk/webfiles/guidelines/Highway%20Links.pdf
says "The preferred width of a one-way cycle lane is 2.0m, minimum width
1.5m. Two-way cycle lanes should preferably be 3.0m wide".
http://www.dft.gov.uk/stellent/groups/dft_localtrans/documents/pdf/
dft_localtrans_pdf_028707.pdf "Adjacent and Shared Use Facilities for
Pedestrians and Cyclists" doesn't seem to cover two-way routes, but
does point out the need for extra room where edges are constrained
(like, say, the sides of a bridge).
A "Vertical feature above 1200mm high" requires an extra 500mm, taking
that 2m bridge down to 1m, which is the absolute minimum for a
pedestrian route ("should only be retained at pinch points, or short,
very lightly used locations where overtaking and passing manoeuvres are
likely to be rare. In any case, 1.0m wide sections should not exceed
6.0m in length", and below the 1.5m absolute minimum for a cycle track.
Those minimums are for single use, "Shared use facilities have operated
satisfactorily down to 2.0m wide with considerable use by pedestrians
and cyclists (up to around 200 per hour). However, this width should be
considered to be an absolute minimum, and the desirable minimum is 3.0m"
(That's the absolute minimum _effective_ width after allowing for the
edge constraints.)
http://www.kent.gov.uk/travelling/downloads/cyclingstrategy.pdf
says a two way shared facility should be 3.0m desirable, 2.5m minimum,
no source quoted.
And it's
Quoted message said:Quoted message said:supposed to open in a week -- no way, a month more like. One of the
ramps is a tight spiral 420degrees round the bridge support -- with
nothing to stop anyone going over the edge!
[...]
Quoted message said:ARMB, your boys will be using this thing eventually, have you taken a look
at it yet?
Only from driving under it. I hadn't realized how bad it was.
I've still not been to have a look, but thought I'd mention that being
largely intended for children going to school, it's going to be largely
one way into that village in the morning and one way outwards in the
afternoon.
(I don't think I ever saw anyone (except myself, rarely) cycling round
that roundabout before the work started, but then I wasn't there at the
time that school children would be.)
