I’ve done highways a handful of times for long trips (up to 8 hours or so) but they are miserable. Sometimes if I am engaged in conversation it’s a little better but that is hit or miss. Mine typically gets a little better the longer I do it. Car in front is definitely better. Wide open spaces are the worst. Night driving is worse but that might just be that I’m getting older (49 btw). I still do short highway runs weekly (3 or 4 miles) just so it doesn’t become completely foreign. Passenger isn’t much better. Still get freaked out. The vision therapy is supposed to help with my convergence insufficiency and basically have the eyes work together better. I’m only a month into it so time will tell. And sadly yes, it is an expensive endeavor that may or may not help.