Coming home from work, local Leo running Ka. V1 sounded plenty of time, Redline quiet even with V1 off until Leo is up against my rear bumper (traffic stop). Both RDs mounted high, V1 on driver side of rv mirror, Redline to the right of the mirror. I thought I would have received a warning on the Redline at a much father distance. A mode on V1, highway mode on Redline.