https://www.rospa.com/road-safety/advice/cyclists-and-motorcyclists/dutch-reach
The Dutch Reach is a practice for drivers and passengers where, rather than using your hand closest to the door to open it, you use your far hand1. This choice sets off a series of five linked actions: reach, swivel, look back, open slowly, and then exit facing traffic.
This practice requires you to reach across your chest to open the door, forcing you to swivel your upper torso. This enables you to look in the rear-view mirror, out to the side, and then look over your shoulder to see any oncoming traffic. You can then look back through the window and begin to open the door, which allows a continuous view of oncoming traffic while preparing to exit, opening the door and stepping out2.
