What mode of transportation did you choose for your last trip of 1000km (about 600 mi)?
WOW. These results are wildly different than my poll about distances around 500km:
https://prodromou.pub/@evan/109855866780546735
...and the one around 200km:
I think there are two reasons for this.
First, there's a threshold between 500km and 1000km where train travel becomes significantly uncompetitive on time compared to air travel; 2x or 3x the door-to-door time commitment.
Second, I changed the phrasing of my question. Instead of, "What is your preferred mode of travel...?" I asked, "What mode of travel did you choose last?"
I think this cuts down a lot on the social desirability bias in responses.
For me, the last trip I took of this distance was a family wedding in New Jersey. We drove down in our electric car. It was harder than we expected; the availability of chargers in the Adirondacks was pretty lacking.
I may go back and re-run my shorter-distance polls with this new phrasing and see how they compare.
Thanks to everyone who replied!