The new law permits pedestrians to cross a roadway at any point, including outside of a crosswalk. It also allows for crossing against traffic signals and specifically states that doing so is no longer a violation of the city’s administrative code. But the new law also warns that pedestrians crossing outside of a crosswalk do not have the right of way and that they should yield to other traffic that has the right of way.
Regular enough bidirectional foot traffic would make it work.
Japan used a flag system, the higher the traffic the less likely it is to work
Flags aren’t bricks.
It’s hard throw a flag through a windshield.