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Unitrans announced that it will launch a new shuttle service, the H line, between the Silo Terminal on Hutchison Drive and Lot 56 in the Health Sciences District, starting Aug. 3 for the 2009-10 year.

At the same time, D-line buses will stop going in and out of Lot 56 in the Health Sciences District. Instead, D-line buses will stay on Hutchison Drive in both directions (east and west), serving stops near the intersection of Hutchison and Health Sciences Drive.

Here are the details for the new H line, running Monday through Friday:

• During the academic year when classes are in session, the H-line shuttles will run twice hourly from the Silo to the Health Sciences District and twice hourly from the Health Sciences District to the Silo, from 7:25 a.m. to 7 p.m., and once hourly in each direction from 7:45 to 9:45 p.m.

• During the summer, the H-line shuttles will run hourly from 7:25 a.m. to 6:45 p.m., with one additional run at 7:50 a.m.

Unitrans also announced minor time changes on the A, L, and W lines, effective Aug. 3.

The A, D, L and W schedules are available ; look for them now in the "News + Updates" section, or, starting Aug. 3, find them in the "Bus Schedules" section. A spokesman said printed schedules will be available starting Aug. 3 on buses and at terminals.