Our local WinCo, a US West Coast chain, utilizes checkout dividers to great effect (and employs some of the other cost saving measures mentioned in this article

Our local WinCo, a US West Coast chain, utilizes checkout dividers to great effect (and employs some of the other cost saving measures mentioned in this article). People aren't nearly familiar enough with using them, though, they park their cart alongside the conveyor belt blocking the next customer instead of going to the end of the conveyor to bag their groceries. An efficient cashier can move faster than two slow customer bagging groceries, some of the local cashiers will have three customers bagging at once.