Happy Monday! At least ten subway lines were delayed Monday morning during rush hour, according to the MTA.

The 1, 2, 4, 5, 6, B, D, L, N and R trains all experienced delays Monday morning, according to the MTA.

A signal problem around 8 a.m. on the 1/2/3 line at 96th St. caused delays on southbound 1 and 2 trains. The N/R also reported signal problems at 49th St., causing delays. The 6 train was briefly suspended around 10:30 a.m., and southbound 6 trains resumed with delays. The 4 and 5 lines were also running with delays, and some southbound 5 trains were running on the 2 line from 149th St.-Grand Concourse to Nevins St.

Smoke conditions south of 149th St. in the Bronx on the D line led to delays on southbound B and D trains.

The L train, meanwhile, was running with delays after the emergency brakes were triggered near Bedford Ave just after 9:30 a.m. Some northbound trains returned to Bedford Ave.