I used to NOT zipper merge, and now i've started doing it... and well... with the bike i definitely zipper merge cause there's always one car that leaves enough space for a car to fit in tightly (so a bike can fit comfortably)
Honestly the more i see non-zipper merging, the more i get frustrated.
Why?
Because it hinders the flow of traffic
You have 2 lanes, one merging in 500m
If you brake at 100m to get it and then realize youre not being let in, you make ALL THE PEOPLE BEHIND YOU BRAKE, and stop, hindering the flow.
If you look at merging around 400m, thats an extra 300 meters of cars that have gotten in the merge lane. This is approximately another 8 cars that are through.
I get VERY ****** at that every time i get out of work (at york onramp to gardiner) where people
1- go from rightmost to leftmost lane (southbound york), cutting off the people trying to turn left into the leftmost lane (northbound york)
2- turn in the rightmost lane, and brake right away to get into the leftmost lane letting only say, one car behind them get in that same lane, rather than merging further ahead that would allow about 6-7 cars to make the turn on time
3- then once we get to the highway, people try to get in right away after the double solid lines while some people try to exit, which creates a bunch of "oh i go? oh you go? oh no, you're going? or maybe i go?"
Anyhow /endrant
If people weren't staying up people's ***** all the time, we'd be able to
1- zipper merge
2- do less random braking on straight lines
When you follow too closely, most slow downs will end up making you brake like when you buffer to high of a resolution on a slow connection... whereas lanes where you leave space tend to go faster as the space provides enough buffer to let the traffic "load smoothly". Which is one of the reasons the qew outside of summer (between 427 and sauga) is almost always fastest in the rightmost lanes as semis always leave a **** ton of space which allows for free traffic flow (lanes changes and slow down) and allows for coasting and not having to brake...
At least that's what i've found from my daily commute to work.