Interstate Highways as Via Points
A couple of interesting points about using Interstate Highways as via points has come up more and more often recently. Adding an Interstate Highway as a via point isn’t as straightforward as you might think and can lead to some very confusing results! I hope GPS manufacturers take a look at this issue. It is becoming more common as people become more savvy creating routes. So what is the issue?
Picture this, you have created a route on your GPS and it takes you down an interstate, but asks you to get off an exit or two earlier than you would have liked. A fairly common thing to happen. Thinking you are smarter in the GPS, you decide to add a via point a little further down the highway. We’ll say that you are in Florida driving South on I-95 and want to go all the way to Highway 50 near Titusville but the GPS wants you to get off earlier. There are a couple of different ways you can do this.
The first thing that might come to mind is to use an intersection as your via point since you know you want to go as far as where I-95 and Highway 50 intersect… You enter I-95 as the first road of the intersection and then try to bring up highway 50… and you can’t find it. Basically your GPS tells you that I-95 and Highway 50 don’t intersect!
Now if you think about it– the GPS is perhaps correct based on a technicality. Interstate 95 and Highway 50 don’t intersect. There are a few on and off ramps that connect them, but the GPS can’t pinpoint the exact location you want. There could be a dozen or more places that might represent where those roads intersect based on the numerous on/off ramps. And where the two roads “cross”, I-95 is actually going “over” Highway 50 and they don’t actually intersect in the middle.
Point on Map
So you get clever and think to yourself that if your GPS can’t find the intersection of those two roads then you can at least pan the map and click on the location of where you want the route to go. Generally speaking this will work, but be very careful to get N/S and E/W lanes properly selected! Look what happens if I accidentally click on the North bound lane of I-95 as the via point when I’m traveling South. The GPS will have you go down I-95, get off at an exit, turn around and go back up I-95 to get on the Northbound via point, then get off and turn around again, completing the circle before finally getting off at the correct location. I’ve done this myself and have heard of other people doing it to.
Changing the Program
It would be great if GPS devices could better recognize these two flaws. Allow me to select I-95 and Highway 50 as a via point and apply some “fuzzy mapping” to recognize that while those roads don’t technically intersect that I want to get off I-95 at the exit that will take me to I-50. And secondly recognize that if the majority of my route travels from North to South and I insert a via point that makes me go in a circle… at least ask if that really was my intention and if I don’t confirm move the via point to the appropriate lane.
If these two things can trip up me, I’m sure they’ve tripped up plenty of other folks as well.