[OSM-newbies] Highway Types and Speed Limits

[Morten Kjeldgaard]

On 14/10/2009, at 21.46, Mike N. wrote:

>> I think it would be better to use a road classification scheme for
>> speed limits; then the mph value only needs to be changed one place,
>> namely the database entry that ties a certain classification to a
>> speed limit.
>
>  That wouldn't work in the US, where US numbered highways range from  
> 35 mph
> to 65 mph depending on physical construction, traffic density,  
> etc.    Even
> 'motorway' class Interstate roads vary from 55 mph to 75 mph  
> depending on
> location, line of sight distance, and traffic.

I see, obviously you are right in that case. However, here in Denmark,  
we have 3 general speed limits (that may be overruled locally by signs):

   - Inside city limits: 50 km/h
  - Outside city limits: 80 km/h
  - Motorways: 130 km/h.

So here, the classification scheme would work quite nicely.

Cheers,
Morten