A Questioning Attitude is Cultivated (Shallow Thoughts)

A Questioning Attitude is Cultivated

At the bottom of the truck route (the main highway going up to LANL), the lab keeps a sign, usually advertising things like Motorcycle Awareness Month or Work Safety Month. I think they change it more or less monthly.

A few days ago, this curious sign appeared.

Don't Dart.
Cross Smart.
A Questioning Attitude
is Cultivated.

It includes a logo of the Institutional Worker Environment Safely and Security Team, or IWESST.

I have no idea what they're trying to get across with this sign. If you want to cross this 55mph highway, don't dart across it because it's smarter to saunter slowly? And what does darting, or crossing, have to do with a questioning attitude?

Or does this relate to some deep secret known only to LANL badgeholders, so if I figure it out they'll have to kill me?

Well, I guess they've succeeded in one respect: they have me questioning the sign.