BOSTON (AP) - Gov. Deval Patrick is planning to announce details about the MBTA's proposed late night weekend service.

Patrick will join MBTA and transportation officials Thursday in Kendall Square for the announcement.

The MBTA said in December that it would begin running all subway trains and its 15 most popular bus routes until 3 a.m. Saturdays and Sundays starting this spring.

MBTA officials said the service would be financed with $20 million in state money as well as corporate sponsorships.

The T now ends service at 1 a.m.

College students and an increasing number of workers in the city's high-tech industries, who say they tend to tend to work unconventional hours, welcomed the announcement.

The T tried a night owl bus service in 2001, but ridership didn't support its cost. It ended in 2005.