These traffic sign control boxes are often are either unlocked or the access code unchanged (I think 0000 is the default), so it's easy to then change the message. I imagine after an incident like this the company will be more stringent with securing it's signs!
These traffic sign control boxes are often are either unlocked or the access code unchanged (I think 0000 is the default), so it's easy to then change the message. I imagine after an incident like this the company will be more stringent with securing it's signs!