[Talk-GB] Tagging Thornbury High Street - not quite pedestrianised

[Colin Smale]

On 2021-01-24 10:33, Stephen Colebourne wrote:

> Resident exemptions are going to be increasingly common in road
> routings, with low traffic neighbourhoods that only allow residents
> with specific exemptions through.

Low traffic neighbourhoods are normally created by combining existing
powers in a structured way, like chicanes, one-ways etc. 

We should concentrate on use cases involving Joe Public. Wherever there
are rules, there are exceptions. Near me there is a country lane which
is one-way - but abutters can get a waiver so it's "one-way unless you
have a permit". Parking, speed limits, turn restrictions, you name it,
there will be exemptions somewhere. So as a basis we should address
private cars, and then override as appropriate for the larger vehicle
classes like foot, bicycle, psv, hgv or usage classes like "delivery,"
"residents" or "destination." As to exceptions, if they are only
applicable to a tiny minority, you might as well tag every highway with
"exemption_possible=yes/no". Let's keep it simple. 

Trying to model all possible exemptions will be an incredible challenge,
as it will need to factor in time/day/date, vehicle, purpose, driver,
and permits at least. access:conditional=* is perhaps a good start.
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