<shrug> Should be simple to gather some facts and then decide. Go to the Iowa DOT website and get the traffic counts on both stretches, along with any other info they post that is relevant. Go to the Iowa State Trooper website or whichever Iowa state agency maintains incident info (varies from state to state) and grab the accident and/or incident statistics for the same two roads. A little simple math - perhaps weighted however it makes sense to you - and you can calculate the likelyhood of an accident, etc.

FWIW, I absolutely HATE driving the interstates in your neck of the woods, especially I-80. Between the truck traffic and... well, don't ask me what I.O.W.A. on a tag means to us on the Illinois-Iowa border <grin>

Regards,

Tom