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cyipt / acton

Active Transport Options for New Developments
https://cyipt.github.io/acton/
GNU General Public License v3.0
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How do we assess severance? #6

Closed joeytalbot closed 4 years ago

joeytalbot commented 4 years ago

One of our aims is to assess the severance of walk/cycle routes. How do we do this?

For major roads, could we use a function that combines the busyness/busynance of road segments with a measure of the quality of walk/cycle provision on these segments?

Do we also want to consider severance by non-road features such as rivers or railway lines?

Robinlovelace commented 4 years ago

Very good question and one that @mem48 and I have thought about in some detail (and we have WiP project on the topic). See here for slides on a method for assessing major rail scheme (e.g. HS2) impacts. This could be adapted for major (40/60/70 mph, B/A/M) roads: https://www.robinlovelace.net/presentations/cs-infra.html#36

Do we also want to consider severance by non-road features such as rivers or railway lines?

I think that would be good, starting with the 'severing features' in OSM and then doing severance calculations sounds like a good plan.

mvl22 commented 4 years ago

Can you clarify exactly what we mean by 'severance' here?

That link doesn't work for me, Robin, possibly because the page source has an enormous pile of latlons which I think the browser is shocking on. Is there a PDF equivalent?

mem48 commented 4 years ago

@mvl22 the paper is about how linear infrastructure (roads, railways etc.) can prevent travel across them because there are no bridges etc.

For a while, I've been wanting to do a fairly simple analysis of removing the roads that are hostile to cycling and then finding the "islands" that you cannot leave because there is no safe cycle route.