In fact I realised I had a tape measure in the office, so I stopped at
several points on Trumpington Road on the way out of town to check the
width where it seemed particularly generously wide.

Lensfield Road to Bateman Street: 1.7m
Brooklands Ave to the bus lane: 1.6m
Immediately after Long Road: 1.6m

However I was appalled to notes that the advisory lane which is marked
within the bus lane itself is only 0.98m.

Continuing on my way home I thought I'd check the mandatory lanes on
Shelford/Cambridge Road, which seem reasonable if not generous, and they
came in at around 1.3-1.45m (3 spots).  Except where it narrows to 1.0m
on the approach to the bridge over the railway at Shelford.

Even worse, the advisory lane on the bridge itself is only 0.9m wide.

All these measurements were taken with my bike safely parked off the
road, and in gaps in the traffic, using a good quality steel tape
measure, and measuring from the top of the kerb to the outside of the
white line.  This gives the most generous possible measurement for each
lane, especially on Shelford Road where the kerbs are sloped back rather
than vertical.

I believe Ian was going to have a look at the ones on Hills Road, but
now I suspect that they too are around 1.7m rather than 2m.

--
elea...@the-blairs.co.uk                          http://lnr.livejournal.com/