Non-Interstate Control Cities

[Mav94]

I know they make some exceptions for cases like that but I haven't lived in Iowa for over twenty years so I don't really remember details.

[roadman65]

I think the furthest away control city on a US route in NJ that actually makes sense is US 40 for Atlantic City. It's too bad there isn't a reciprocal one in Atlantic City for Wilmington or Delaware Memorial Bridge. Others are a bit silly. No one is taking US 202 from Morristown to Ramapo, NY or US 1 from New Brunswick to Newark.

Or on Route 23 they use Montague over Port Jervis.  Montague is a township covering many square miles where on any map it shows it as a dot on US 206 and not on Route 23.

[kphoger]

I've always liked Iowa's approach:

Next incorporated town
First county seat after that
First town over 5,000 after that

I feel like this could lead to weird results. What if the next county seat is four counties away, or it hits a decently sized city that isn't a county seat and is forced to skip it?

Using US-6 as an example...
https://maps.app.goo.gl/xua8wNV2dYbMnAmS8
Brooklyn is not a county seat, yet it gets the second line.
Grinnell is skipped in favor of Newton.

Going the other direction...
https://maps.app.goo.gl/PA9tpVXrtELqHSiEA
Grinnell is not a county seat, yet it gets the second line.

[Mav94]

It's possible I'm misremembering.