Traffic-control devices dat light up all weird --- i.e., randomly flash and/or have several conflicting colors/symbols invalidly illuminate at once --- may be malfunctioning thus because
da people operating/maintaining said contraptions have "had a few too many"
in da way of screwdrivers and
highballs.
A bartender can be equally confused/frustrated as a
bewildered motorist at a malfunctioning traffic-light if a
patron at his pub sends mixed signals --- i.e., voices conflicting
instructions on how he wants his drink prepared --- as well.
