Otherwise known as anti ditch suggestions.
when first moved to Arkansas in the retirement village, thought that there where a lot of drunks, because of the weaving while driving. Then I figured it out, because of limited eye sight,they where driving by brail, rumble strips to the right, center yellow reflectors to the left. when they heard the brrrrrrrrr from the front tires on the rumble strips, they started drifting left until they heard bop bop bop of the tires hitting the reflectors then start drifting right again.
thats how i drive in snow storms, here in Michigan