15 min neighborhood routing issues

[XioNoX]

Again, thanks for those great tools!
I found a few issues within the 15 min neighborhood feature and couldn't find any existing tickets, so here it is:

First, in the walking mode see screenshot below:

• I think it should be allowed to route through (at least) residential roads with no sidewalks. For example this way
  or that way don't have sidewalks
• Then I'm not sure why the "reachable" zone, doesn't extends more to the west (on the same road), as there are sidewalks all the way, my guess is that it requires crossing the road (but there is a sidewalk too. It should probably be fine to cross the road outside of sidewalks on (at least) residential roads.

In cycling mode,

• Probably because of this way again but it should be able to cycle through it.

[dabreegster]

Thanks for reporting! It'll probably be December before I can look into any of these, but I'll pick up then

[dabreegster]

Same as the other issue -- the routing for pedestrians is particularly bad in A/B Street for reasons hard to fix. https://github.com/dabreegster/severance_snape/ is a new project that should work better.

For the cycle routing problem, there is still something wrong, but I haven't looked into it yet