The other solution, the 4SEE Rear-Collision Warning System, uses data processing, a rear radar unit, and an auxiliary strobe lamp to increase safety.
"We're taking [this system] to the next level, from a reactive, brake-activated strobe to a proactive radar-based strobe," Grote explained.
Developed by a partnership between Grote Industries and Einstein AI, the Rear-Collision Warning System calculates the 'time to collision' whenever a car approaches the back of a truck, factoring in its speed and the space between the two vehicles. According to Biank, if that 'time to collision' metric is less than four seconds, then the light flashes, warning the trailing driver that it is approaching too quickly.
"[It's the] same concept as a forward collision [mitigation system], but it's always monitoring, always checking to make sure you're safe," Grose noted.
Built on Grote’s 4SEE Digital Harness, the system is an offshoot of 4SEE and can leverage all of its data, including the speed of the trailer and tractor, the angle the steering wheel is turning, and more. 
"It's quite literally a plug-and-play," Grose said. "Because it's a modular harness, if you already have a 4SEE system, you can just put in a splitter and connect that with a module."
It also includes lamp-specific light-out detection and over-the-air updates for added security.
Both the H.E.L.P. and Rear-Collision Warning Systems can be ordered on new trailers and retrofitted on older ones.