WASHINGTON (AP) — Spectators heading to President Barack Obama's second inauguration encountered blocked-off streets, long lines at some security checkpoints and a crowded National Mall. But authorities reported no major problems ahead of Monday's swearing-in, and forecast a significantly smaller crowd than the record-breaking turnout of 2009.

Police officers were stationed inside commuter rail stations and on street corners, and National Guard Humvees blocked some intersections in downtown Washington. Extra security was planned in the water and skies, including more than 2,000 police officers from out-of-town agencies sworn in to work security.

There were sporadic reports of slow-moving security lines and of checkpoints that opened later than advertised. But organizers said they hoped more and earlier signs, plus additional metal detectors, would ease congestion and reduce some of the logistical snafus from four years ago.