Dropped objects on A12 in Essex prompt new signs
Emergency advice signs have been fitted to 10 bridges over the A12 in Essex to help catch people dropping objects on to cars, after a number of incidents.
The signs, between Mountnessing and Boreham, tell drivers what to if they see anything suspicious and the exact location of the bridge.
The signs are aimed particularly at drivers who are not local.
Essex Police are investigating two incidents of objects being dropped on to cars on one evening in December.
A 57-year-old woman suffered life-threatening injuries when a block smashed the windscreen of a car near Galleywood on 1 December.
Forty minutes earlier, a mother and daughter had been left shaken when their car was struck by a large rock dropped from Fryerning Lane Bridge on the A12 at Ingatestone.
The yellow signs have been paid for and provided by the Highways Agency.
They are similar to a batch of 60 fitted to bridges over the A12 and A14 in Suffolk last month, following other incidents.
Ch Insp Richard Phillibrown of Essex Police said: "It is important we receive information quickly and precisely in any incident.
"As the A12 is a major trunk route and is used by hundreds of thousands of people from outside Essex, many people could be confused about their location."