Did Somebody Order a Sign?
I'm going to need you to sign for it. Get it? Mail joke! Okay, I think I'm starting to get a little punchy. Let's keep moving with the signs.
Curve Suggested Speed Limit

This sign does double duty. It lets you know a curve is coming up and it tells you what the suggested speed limit around the curve is. Do you ever see those guardrails around curved roads that are all smashed up? Yeah, that's why this sign exists.
Sharp Suggested Curve Speed Limit

Okay, this one is very similar to the regular curve suggested speed limit sign, except now we're talking about a sharp curve. Completely different situation.
Highway Exit Suggested Speed

This sign looks like a speed limit, but it's actually just a suggested speed limit. You don't HAVE to go that slow, but it's a good idea. A sign just for advice? These sign guys have thought of everything.
Steep Downgrade

A steep downgrade sounds like a euphemism for getting dumped, but no, it's just a road with a sharp down-angle. All drivers should approach with caution, and you may need to use a lower gear in order to slow your vehicle (especially for trucks and other heavy vehicles).