[snip]

If the driver is floppy, I would suspect either sleepiness, drunkeness, lack of
skeletal structure, jellyfish genes, or maybe the driver is just very limber?
Whether installing a side visor would actually help any of these conditions is
debatable.  A side visor might block the sun's rays from coming in from the
side, but they still could get in through the floor.  Or the tires.

Why are you yelling so much?  I haven't a clue where your glasses are,
nor do I care about gardening gloves.  Please take your diatribes elsewhere,
as this is a forum for mystery fans and ka-bob-ers.

Hope this helps.