A lot more effort needs to go into road design too though. The best merge is the one you never even need to do. For instance, I’ve seen ridiculous things like

A lot more effort needs to go into road design too though. The best merge is the one you never even need to do. For instance, I’ve seen ridiculous things like roads that open up two new lanes, only to remove BOTH of the new lanes within a half mile or so. (There wasn’t even an exit in between, just space they decided to use.) Predictably, that creates an insane cluster of traffic every single day in rush hour that could have been 100% avoided by simply not offering either of the bait lanes to begin with! I also do not understand why so many merges have one tiny sign as the ONLY indication of a merge, sometimes over a very short distance. What, you just spent a few million on a road and you can’t afford 2 or 3 signs per merge? Put them up! Give people every chance to move. Surely it can’t hurt.