Clever

 Before leaving for our trip, Mary and I tried to go on lots of training hikes to get ready.  We ran into many road closures and repairs in progress due to the winter rains.

One day while walking in Spain, I saw this guy working a one way traffic control at a construction site.  Its brilliant!  Instead of needing two flagmen with walkie-talkies standing in the rain all day directing traffic, just wheel in a couple of these, program the timing sequence, and I bet they'd run unattended for weeks.