[Talk-us] South Carolina State Highways - primary overload

Martijn van Exel m at rtijn.org
Wed Jan 29 15:07:10 UTC 2014

On Sun, Dec 22, 2013 at 7:42 PM, Greg Morgan <dr.kludge.gm at gmail.com> wrote:
> I use residential for 0 to 25 mph residential roads.  That tag seems
> obvious.
> I use tertiary for 30 to 35 mph roads.  I see most of these types of roads
> as connecting residential subdivisions.  These roads tend to have bike lanes
> too.  I also see dashed yellow lines or two solid yellow lines as another
> indication of changing the road to tertiary in mostly residential areas.
> I use secondary for 40 to 45 mph roads.

I like the simplicity of that scheme, but it sort of breaks down when
you go up to primary and trunk - many urban primary roads will also be
35-35 mph.

What do you do for trunk roads?

Martijn van Exel

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