This weekend’s Metro track work will impact the Red and Orange lines. The good news is that no stations will be closed, so riders can avoid the dreaded bus bridges. The bad news is that there will be single-tracking and delays.

Here’s the planned work, which is scheduled to begin 10 p.m. Friday and run through the system’s closing on Sunday night:

[UPDATE: The Red Line work will last until the system closes on Sunday night, but the Orange Line work will only last until the system closes on Saturday night.]

Red Line

Trains will single-track through between Shady Grove and Twinbrook and between Rhode Island Ave and Takoma. This is to allow for platform reconstruction, track work and third-rail upgrades.

If you’re traveling through either of these work zones, add at least 15 minutes to your travel time.

Red Line trains will run between Shady Grove and Glenmont every 24 minutes. From 9 a.m. to 9 p.m. Saturday and Sunday, extra trains will operate between Grosvenor and NoMa-Gallaudet, so trains should service those stops every 10 minutes.

Again, this work will last until the system closes on Sunday night.

Orange Line 

Trains will single-track between Ballston and West Falls Church (for rail joint elimination and fastener renewal) and between Stadium-Armory and Cheverly (for platform reconstruction).

Orange Line trains will run every 24 minutes throughout the weekend. Make sure to add at least 15 to 20 minutes to your travel time.

This work was originally scheduled to last until the system closes on Sunday night, but Metro announced on Friday afternoon that the work would only last until the system closes on Saturday night. So there won’t be any Orange Line single-tracking on Sunday.

Next weekend: Station closures return on the Orange and Blue lines. Buses will replace trains between Stadium-Armory and Cheverly (on the Orange Line) and between Stadium-Armory and Largo Town Center (on the Blue Line). On the Orange Line, the Minnesota Avenue and Deanwood stops will be closed, while on the Blue Line, the Benning Road, Capitol Heights, Addison Rd, Morgan Blvd and Largo Town Center stations will be shut down.

RELATED: Dr. Gridlock on how Metro station closings will affect all lines in the coming months.

This post has been updated to reflect the Orange Line single-tracking ending on Saturday night instead of Sunday night, which was announced late Friday afternoon.