https://wjla.com/news/local/maryland-drivers-why-drivers-suck-car-crash-washington-dc-dethrones-los-angeles-worst-traffic-usa-nation-according-new-report-collision-traffic-commuting-dulles-i-495-federal-employees-gw-parkway
I suspect DC used to keep commutes in check with metro and slugging etc. but post pandemic most people drive alone and all bets are off.
RTO is also cited as a factor as private industry didn’t have necessarily all return in lockstep.