Does any GPS allow custom routing options??

You guys are giving him WAY too tough of options (too much work and thinking involved). It appears to me that all the OP wants to do is hit a button, and stare at a screen while he steers his truck.

 

http://techchannel.radioshack.com/make-routes-pc-garmin-nuvi-2167.html. It looks to me simple... Is not so simple. Unless its worth it to make the route on your downtime

 

+1 on the Trip Planner feature on the Garmin. My company gives me my route and fuel stops--often not exactly the way the GPS automatically selects--and I use "browse map" to program the whole trip in before I leave the yard.

https://www.youtube.com/watch?v=bZofcxMZVIE

This is a huge advantage over the Rand McNally which pretty much gives you only two choices. Take it or leave it.

 

I have a Rand RM510... I'll just add "vias" until it has the route I want to run. Cheyenne to Dallas would be adding intermediate destinations like Lamar CO, Amarillo TX, Childress TX and Bowie or maybe Decatur TX to force the routing down US287. Basically you just add waypoints along the route you want to take until the routing algorithm gives in to you. The Rand allows me to save these trips that I use frequently, so I just add the final destination to the saved routing. I'm sure you can find the same features in a Garmin unit.

 

Your Garmin should let you select total miles also, instead of just to next waypoint, just tap on the icon that shows your remaining mileage and it lets you change it to numerous different things

 

That is a possibility, mine is just under 3 years old, garmin dezl 560lmt