If you live in a city, every commute could be a “'best-of” reel of dangerous driving, Car doors, in particular, have become an excellent teaching aid in proving Newton’s law that objects can occupy the same space simultaneously. Bikers, often sandwiched in a bike lane between parked cars and flowing traffic, are so likely to be struck by errant ( 错误的 )car doors that the phenomenon now has a name: dooring. Sadly, it’s more common than you’d think. A 2011 report found that there was roughly one dooring accident in Chicago every day of the year, accounting for about one in five of all reported bike crashes. New York City recently announced a safety plan including a new video advertisement and “LOOK! For Cyclists” sticker on all city cabs. This is a nice start for a city that serves about 336,000 cab passengers every day. Still, a sticker does not make a complete behavioral change, and there are more than 250,000 daily Uber and Lyft passengers in the city who will miss this message altogether. What, then, is the next step to ensure peace between bikers and drivers? The excellent urban design blog 99% Invisible reports a simple, almost effortless motion you can take as a driver or passenger of a motor vehicle concerned about cyclist safety: Just open your door with your right hand. This tip comes from the Netherlands, which is why it’s known here as the “Dutch Reach”. If you are sitting on the driver’s side of a parked car and want to get out, don’t open the door with your door-side (left) hand as you’re intuitively prepared to—instead, open the door with your right hand. This simple motion causes you to pivot( 转移 )your entire upper body as you reach, first drawing your line of sight past your rear-view mirror, and then out to the street behind you. If you are on the passenger’s side, use your left hand instead of your right. It’s just that simple—and it works. So effective is the Dutch Reach that it doesn’t even have a name in the bike-friendly Netherlands. For decades, that’s just how drivers have been taught to open a door. Like any habit, the Dutch Reach will take a while to internalize. Dutch Reach.org, a safety advocacy movement trying to make the reach mainstream, has plenty of resources for spreading the word, and a few slogans that could help you remember. Our favorite: “Reach, Swivel( 转动 ) , Look, Open.” Of course, if it’s easier to remember, you could always just tell yourself to “Go Dutch”.