[Talk-us] US highway classification

[Nathan Edgars II]

On 5/28/2011 10:52 PM, Nathan Mills wrote:
> Only if trunk has a meaning that implies that a road tagged trunk is
> somehow better than a road tagged primary, which it apparently does not,
> at least in some people's minds. If you're going to waste trunk on curvy
> two lane roads, a router may as well use distance or maxspeed as a
> better metric. As it stands, some of us are using trunk as more of a 'I
> know it when I see it' thing than something useful for routing purposes
> like motorway.

Your same argument applies to the difference between primary and 
secondary, and that between secondary and tertiary.