So you don't see a problem? Wait a couple of days and get back to me.
Anything that cuts down on traffic is fine by me. :-)
I can tell that prices are not "too high" yet just by looking at all the cars on the highway. When it gets "too high" then people will drive less. Simple.
$4.00? $5.00? Annoying... sure. Not crippling. Not worth panic.