If you’ve ever griped about being mired in a traffic jam, there’s proof this weekend in Russia that it could have been worse. The back-up Sunday afternoon on part of the M-10 — the main highway between Moscow and St. Petersburg, the country’s two most populated cities — stretched 125 miles long, according to media reports cited by state-run RIA Novosti news. One lane in each direction was cleared by evening, at which time the jam still stretched 34-miles long.