[mkgmap-dev] [PATCH v1] Synthesise cycleways that allow reverse bicycle routing on oneway streets

Wed May 27 13:08:51 BST 2009

On Tue, May 26, 2009 at 9:05 AM, Mark Burton <markb at ordern.com> wrote:
>
> Here's a little patch that will synthesise a cycleway that "lies on
> top" of an existing oneway street when any of the cycleway="opposite"
> tags are present. This will allow bicycle traffic to route in the
> reverse direction. I have tested this using mapsource (it worked!) but
> not a real GPS yet.

I tested this last night, as there are several streets close by where
this applies.

It seemed to work... mostly.

Strange things start to happen when you are directly on the street in
question. It appears that my eTrex sometimes decided I was on the
street, and not the cycleway, and sent me backwards.

Conversely when I switched back to car routing, the GPS device sent me
(for short distances) on the cycleway.

Things seemed to be OK when I started routing outside of the one-way street.

I would like to test this further: to do so, I have to first update
the OSM map in my area (there are a lot of one-way streets here which
allow reverse-flow bicycle traffic, but I have always ignored them).
I'll try to report back in a few days with further real-world results.

Cheers.