Australias straightest longest road is 146.6 km (91 mi. and 163.7 yd) on the Nullarbor plains. this pic taken by my Patriot brothers heading home. What's your record?
Longest straight-a-way that I can think of in Utah is a section of I-80 just before you get to Wendover Utah/Nevada state line... (42 or so miles) thru the salt flats.
And the side winds there are ridiculous. I was leaned over against the wind pretty much the whole way last September.