legal and safe are not always the same thing. I take safe over legal.one question, at what speed does lane splitting become illegal ? most drivers don't mind a bike rolling by them in congested traffic but when they fly by that's what gets people upset, it all in how you do it, i mean is weaving in and out of traffic really lane splitting. especially if traffic is rolling at half the speed limit say 35mph, you can't convince me it's safe
Traffic rarely moves at a constant pace, on my commute it can go from stopped to 45 then back down to 20, then up to 30, then down to 5... etc. It is a constant ebb and flow. Thus I "try" to stay around 15mph differential, but really I am speeding up and slowing down with the traffic to keep my differential speed as safe as possible.
If traffic is going 65 and I am moving faster than traffic at 70 or 75, my differential is still only 5-10mph, which is very safe in comparison to someone who's differential is 25-35mph.
I need to make sure that I can react to the traffic around me and never be moving faster than cars can logically see me if they use their mirrors before changing lanes.
Here is a perfect example of my safe lane splitting speed and that of an unsafe rider:
Differential speed is the only speed that matters when it comes to safer lane splitting.