PORTLAND, Ore. (AP) - The Portland Aerial Tram will resume Sunday service beginning May 18 to accommodate anticipated summer tourist demand.

It will operate from 1 p.m. to 5 p.m. on Sundays through Sept. 14.

Also, starting on Monday, June 30, the Tram's schedule will be modified to better serve weekday riders and to enhance operating cost efficiencies.

On that date, the Tram will begin operating on a published schedule during non-peak weekday hours, departing every 10 minutes -- rather than adhering to the current fast-turnaround.

Also starting on June 30, weekday service will begin and end a half hour earlier, beginning at 5:30 a.m. instead of 6 a.m. - and ending at 9:30 p.m. instead of 10 p.m.

Saturday service will continue its regular schedule, starting at 9 a.m. and ending at 5 p.m.

The Tram is Portland's public transportation link connecting South Waterfront with Marquam Hill and OHSU's main campus.

(Copyright 2008 by The Associated Press. All Rights Reserved.)