I'd like to see a review of how the various navigation apps do in situations with unusually heavy, unusually widespread traffic, such as when people were trying to go home after the 2017 total eclipse in the US.

I was using Waze when leaving Madras, Oregon, after the eclipse heading to the Puget Sound area of Washington. It suggested a route that would bypass a couple miles of slow traffic, but the road it sent me down was a dirt road with a periodic undulation in it that caused massive vibration, and my car and the two or three others that were on it were throwing up so much dust it was very hard to see. I turned around and went back to the main route and put up with the slow traffic.

A friend of mine was also leaving Madras, but heading to California. He was using Google. It also was giving some poor route advice. Here's what he told me when we compared notes of our trips home:

> Google kept sending us onto logging roads: we bailed on the first when we were told to turn onto a non-existent road; we bailed on the second when a van came out and told us that ~5 cars were stuck axle-deep in mud; we bailed on the third when we got to a sign informing us that we were about to enter an off-road-vehicle trail.

I'd also like to see a review of how the various cell phone companies handled it. Both me and my friend are on T-Mobile, and something like 90% of the text messages we tried to exchange were either lost or delivered hours late. I think we managed one or two short voice calls. Most voice calls either did not connect, or on occasion would connect but only one of us could hear the other.