What do you all think about best signing practices for control cities on non-Interstate (and non-freeway) roads? I'm talking about primarily US Highways but some major state highways can be included too.
Some states, such as Arizona, use a control point map, while others, such as Kansas, have criteria for choosing them. I don't know that one approach is better than the other, though the latter affords more flexibility.
But in the Midwest where there are many tiny towns at short 20-mile intervals, frequently the next town over is signed as the control city instead of a larger town 50 or so miles away.
For example, Cimarron (13 mi away) is the control city instead of the much larger Garden City (46 mi away) for US-400 W in Dodge City, KS.
Cimarron is the seat of Gray County. These are Kansas' criteria for choosing control points off the Interstate system (listed in priority order):
* County seat within 100 miles.
* Incorporated city within 100 miles having population greater than 1000.
* Major highway route.
* Incorporated city with population less than 1000.
* Unincorporated community.
On northbound US 283 at its intersection with US 56/US 400 south of Dodge City, the left-hand destinations are Sublette (seat of Haskell County, west on US 56) and Cimarron (west on US 400). Montezuma is closer than Sublette, but with 974 people barely misses the 1000 population threshold. The right-hand destinations are Jetmore (seat of Hodgeman County, north on US 283), Kinsley (seat of Edwards County, east on US 56), and Greensburg (seat of Kiowa County, east on US 400).
At least in Liberal, KS they sign Garden City for US-83 N which is 68 miles away instead of Sublette (34 mi away) which US-83 passes close to.
Yes. The criteria afford some scope for exercise of discretion.
Internationally, there are more elaborate versions of these two basic approaches. Britain, for example, has a hierarchy of primary destinations that appear on signs for the motorways (blue background) and primary routes (green background--"major A roads" is a loose term for this network). The tiers are primary (Oxford, Southampton), super-primary (London, Leeds), and regional (The NORTH, The NORTH WEST, SCOTLAND). Designers can choose which to put on signs, but there is an expectation that continuity in signing will be maintained (i.e., once you see a destination on a sign, you should be able to follow subsequent mentions of it on signs until you reach it). France, on the other hand, has the concept of a signing map (
schéma-directeur de signalisation) that shows a network and lists all of the destinations to be signed at each intersection. Central government (i.e., the folks in Paris) must approve the map that covers the
réseau vert ("green network," basically the equivalent of the primary-route network in the UK).