Yes, Onspots work in reverse. The important question of engaging chains in reverse is asked time and time again. Moving in reverse is always challenging due to obstructions (your field of vision is blocked by the vehicle itself), depth perception, and the difficulty of controlling your speed and direction; now add snow and ice!
Often times 4x4 is discussed as an alternative to Automatic Snow Chains. On ice, more times than not, if one wheel is slipping, so are the other three. In reality, the two systems are complimentary to one another.
Onspot provides traction in cases where all four tires lose traction or when stopping which is equally as important to driver, passenger, and cargo safety.
Transporting people or products in adverse weather conditions is difficult but with the ability to move in forward or reverse combined with the ability to stop with confidence provides peace of mind for the driver.
Yard spotters are used to move and spot trailers/containers at terminals, ports and warehouses. Unlike most roads and highways, these sorting and processing areas are not always easy to traverse in snow and ice especially in reverse.
As with a school bus backing up, “throwing the chains” first will make reversing easier by giving the driver control of speed and direction. Stopping or reversing safely is as important as moving forward and tire chains give added control on snow and ice.
Automatic tire chains allow the driver to proceed safely on snow and ice from inside the vehicle with just a flip of the switch.