I hate blue signs. They are ambiguous in whether they are mandatory or not. For example joining a dual carriageway from a side road there is a blue arrow meaning you must turn left. Also Bus lane signs are blue and I'm sure bus lanes are mandatory as in general traffic must not enter them.
Yet blue road-side cycle route signs are for information only? Not surprising that the general public thinks cyclists should stick to these routes..
Blue and white signs are not all "Information only".
There used to be a general rule: Circular gives orders (red border prohibits things - except 'STOP' which is entirely red, lack of allows - e.g. 'GO' or 'NSL' signs), triangular gives warnings, rectangular gives information ('you might like to know that your destination is this way').
That has now changed and orders are now sometimes given by rectangular signs (e.g. '
P Permit holders only' really should be '
P with circle around qualified by 'Except for Permit holders' - but some people would think that Permit holders were not allowed to park!)
Many blue and white signs come under the major heading "Signs giving orders", even though this is qualified by a
subheading "Signs with blue circles but no red border mostly give positive instruction." - most are circular still, but that is confusing as the HC shows some rectangular signs there too (e.g. Bus Lane signs).
Warning signs are still mostly triangular (apart frrom the old ungated level crossing, 'traffic lights not in use' which I always regard as informational as it means I can proceed with caution, sharp bend chevrons and (again what I regard as information) signs telling you to obey light signals).
Information and Direction signs are still (fortunately) rectangular and Roadwork signs can be any relevant shape. I don't see that sign on there though.
I interpret it as: Not circular, so
probably not an order - since blue orders are (meant to) "mostly give positive instruction" the negative instruction to dismount cannot be an order.
Yeah, it's instructional to car drivers, that cyclists dismount at their destination (which
might be at the sign).
source:
http://www.direct.go...t/dg_070644.pdf