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Ranking Bordeaux and Nantes next to Amsterdam is nonsense. Amsterdam is miles ahead in terms of infrastructure. This ranking dilutes the most important thing t

by maelito 11mo ago

Ranking Bordeaux and Nantes next to Amsterdam is nonsense. Amsterdam is miles ahead in terms of infrastructure. This ranking dilutes the most important thing to get these results : good bike lancés everywhere with no discontinuity. Disclaimer : I've built villes.plus, an open source automated evaluation of bike lanes. 100 points, compute itineraries in "secure" mode with Brouter between these points, count the % of secured km -> score. Amsterdam tops at 8/10. Bordeaux is at 3/10, Nantes 2/10. https://villes.plus/cyclables/Amsterdam?id=271110 https://villes.plus/cyclables/Amsterdam?id=271110 https://villes.plus/cyclables/Nantes.8 https://villes.plus/cyclables/Nantes.8

throwaway198846 11mo ago
What does it mean to be "secure"?
- maelito 11mo ago
  https://github.com/laem/villes.plus/blob/master/isSafePath.js https://github.com/laem/villes.plus/blob/master/isSafePath.j... Feel free to suggest a better algorithm ! It's version 2, issues already discuss missing important OSM tags.
noobcoder 11mo ago
Fun fact Amsterdam recovers roughly 15000 cycles per year from their canal. IIRC they have a board with the number for each year
prmoustache 11mo ago
I can't speak about Nantes which I haven't visited for decades but I think it is wrong to count bikes lanes as a single parameter. Dutch urbanists have found that bike lanes are very important when streets used by cars are unaltered. Once you implement a lot of traffic calming features and cars never reach 30kph comfortably, bike lanes aren't that important and then streets can be shared across all users.
- maelito 11mo ago
  > it is wrong to count bikes lanes as a single parameter. Of course it is. See % of safe km as a minimal condition, not as perfection. Note that bike lane ! = safe km. You're right. There are bad bike lanes and good peaceful streets. See other comment for algorithm. 20 km/h streets are counted.
DonHopkins 11mo ago
>Amsterdam is miles ahead in terms of infrastructure. Amsterdammers prefer to think of themselves as kilometers ahead. ;)

by maelito 11mo ago

throwaway198846 11mo ago

What does it mean to be "secure"?

maelito 11mo ago
https://github.com/laem/villes.plus/blob/master/isSafePath.js https://github.com/laem/villes.plus/blob/master/isSafePath.j... Feel free to suggest a better algorithm ! It's version 2, issues already discuss missing important OSM tags.

noobcoder 11mo ago

Fun fact Amsterdam recovers roughly 15000 cycles per year from their canal. IIRC they have a board with the number for each year

prmoustache 11mo ago

I can't speak about Nantes which I haven't visited for decades but I think it is wrong to count bikes lanes as a single parameter. Dutch urbanists have found that bike lanes are very important when streets used by cars are unaltered. Once you implement a lot of traffic calming features and cars never reach 30kph comfortably, bike lanes aren't that important and then streets can be shared across all users.

maelito 11mo ago
> it is wrong to count bikes lanes as a single parameter. Of course it is. See % of safe km as a minimal condition, not as perfection. Note that bike lane ! = safe km. You're right. There are bad bike lanes and good peaceful streets. See other comment for algorithm. 20 km/h streets are counted.

DonHopkins 11mo ago

>Amsterdam is miles ahead in terms of infrastructure. Amsterdammers prefer to think of themselves as kilometers ahead. ;)