Map questions.

I have a rand mcnally GPS but I have the traditional motor carrier atlas that I use as a trusted reliable. GPS will get you there but sometimes you can find a route in the atlas that is just as legal and shorter. Anyway, in the atlas(I know this sounds stupid) but unless the route specifically prohibits trucks, what is the difference between staa routes (the "highlighted" routes) and a regular highway? Example, I was planning a route that will take us through NM and noticed U.S. 550 is one such highway. The front of the atlas does not list this as a restricted route and I could have sworn that a few years back I ran down that way through Cuba and into ABQ before hitting 40.

 

The shortest does not mean the fastest or best route.

Other than that, what the heck are you talking about?

 

STAA approved routes. Unless the atlas specifies it or there is signage stating otherwise, you can take a truck down those roads in the atlas that don't show to be an STAA route?

 

STAA routes are minimum 12 ft wide lanes with minimum 13'6" clearances. They are designated high truck traffic routes. If it's not marked as STAA, it may only be 9' or 10' lanes, but otherwise, no reason you can't be on it. It should be marked as restricted or with low clearances if you aren't allowed on it, with few exceptions. Then again, just because you CAN be on the road, doesn't necessarily mean you SHOULD be.

 

National Network - Wikipedia

 

thanks. I knew it had something to do with dimensions. It also boils down to using judgement. If that shortcut is legal to drive, what's the situation like with fuel stops, places to park in an emergency, etc.

 

US 550 is a prime example where the powers that be seemed to stop working [about 25 years ago] designating "approved routes" I much prefer routing through Cuba as opposed to via Gallup.

But probably the standards need to be modified slightly, then redo the maps but I don't expect this to happen

There are a good number of prudent and sensible route options across the US that are not highlighted. Just look for specific restrictions, ask questions, and use common sense.

 

That last bit of your post is sadly what a lot of folks don't use.

 

ans I should supplement my prior reply with this reply.

There are lots of non-highlited roads where 53-102 trailers will get ticketed regularly, especially in northeastern states and California.

 

STAA routes unless noted are good for at least 13'6" 102 wide and 53' trailers. Some states like TN and NY are 48' states, whereas being off a STAA route more than 1 mile in NY with a trailer longer then 48" can catch you an overlength ticket.