UK manufacturer of temporary, solar powered variable message signs (VMS), Bartco UK, will unveil what it claims is the first temporary VMS designed for use within work zones. The HD Quattro was developed in response to feedback from customers requiring a product to affirm on-site speed limits for work zone vehicles. Designed to show limited amounts of information, such as speed roundels, at just 600mm x 600mm, the free-standing, 12v battery-powered device is the smallest VMS in Bartco’s portfolio.