This was overturned practice all the way back in the 1970's IIRC. It creates higher speed collisions, panick situations, it is impossible for the faster approaching vehicle to gauge the speed of intersection, and it steals the ability to slow down to mitigate potential conflict and collision. It is wrong and it is based on terrible logic. I have commuted full time by bike for many years. I have been hit by 7 cars. Riding backwards is illegal and absolutely will get you killed. A car hitting you from behind is rare but is not even close to the biggest cause of crashes. The biggest issue is illegal u-turns and driveways entering and exiting the road. A driver in never going to look for backwards traffic before exiting a driveway. Drivers are licensed if a driver is incompetent, they should not have a license. This is the key legal issue that should be addressed but isn't. There is a western culture stupidity about unqualified drivers allowed behind the wheel. This is incompatible with a completely inadequate public transit system and so there is no practical low bar for terrible drivers. The result of this lack of effective public transit is that we pay in blood and deaths instead of funded public infrastructure. Riding backwards as a policy only makes the problems worse; this has been proven legally and is the law everywhere.