In these troubled times, it’s sometimes necessary to put in place roadblocks to arrest the progress of suspected criminals.
It’s hard for police to get to the right place to intercept them, without risking their own lives and those of bystanders.
Today’s invention is street lamps which can be lowered, by wireless signal, using a hinge at their base. They could thus block a road and act as a reinforced barrier to speeding vehicles.
Once lowered, the lamps themselves could be made to flash on and off to draw attention to the local road closure (right hand diagram).
Lamps might also interlock across the road for added impact strength.