[Routing] "SatNav warriors invade Somerset village"

[Frederik Ramm]

Hi,

> Now we need some way of tagging "slow" roads, so that we don't pick
> then. I'm not sure if this would be an "average speed" tag or a you'll
> only go 3/4 or half the speed on this road compared to your speed on a
> "normal" A road?

This would be a good start. But we also might want to go one step  
further and try to record *why* the road is "slow", allowing us to  
make much more fine-grained suggestions.

For example, a narrow and windy road may slow down the average car  
driver but a lorry might not have a problem because the driver sits  
high and can look past the curve (and thus doesn't need to slow down  
fearing oncoming traffic). (Motor)cycles may also be relatively  
unaffected by the situation. In other cases, the same factors that  
make the road "slow" for the car driver also affect HGVs and (motor) 
cycles. If we just tag "slow" or "3/4 speed" then this distinction is  
not possible.

> It might also be interesting to build a set of interesting "test case"
> routes such as this that we can compare "hand" picked routes  
> against the
> routing algorithm in order to find the best

I'm sure such a set of test cases would be worth a lot to people  
implementing routing.

Bye
Frederik

-- 
Frederik Ramm  ##  eMail frederik at remote.org  ##  N49°00.09' E008°23.33'