Tim Bracken, wtop.com

We have come to accept midday Metro delays as the norm, but some weeks are worse than others when it comes to single-tracking. We’ve also had more than our share of Metro woes in the last few weeks, including cracked rails and long-term entrance closures.

This week, it’s all scheduled single-tracking that will hold you up during your daytime (and late evening) travels. Every line is affected, excluding the Yellow Line. Here’s what you need to know from Metro:

Red Line

• Monday through Friday, from 10 a.m. to 2 p.m. each day, trains will single-track between Friendship Heights and Medical Center for rail renewal. Expect minor delays (up to 10 minutes).
• Monday through Thursday evenings, trains will single-track between Van Ness and Medical Center for NTSB-recommended track circuit replacement, and between New York Avenue and Rhode Island Avenue for DDOT bridge work. The work will begin at 10 p.m. on Monday evening, and at 8 p.m. Tuesday through Thursday. Once work begins, Red Line trains will depart endpoint terminals every 30-35 minutes. Customers should allow 20-25 minutes of additional travel time.

Orange Line

• Through Thursday, beginning at 10 p.m. each night, trains will single-track between Foggy Bottom and Ballston for prep work associated with an upcoming NTSB-recommended switch replacement project. Trains will also single-track between Eastern Market and Stadium-Armory for station rehabilitation and track work. After 10 p.m., trains will operate every 30-35 minutes. Customers should allow 15-20 minutes of additional travel time. Customers traveling between D.C. and stations in Arlington may consider Metrobus route 38B (Farragut Square-Ballston).

Blue Line

• Through Thursday, beginning at 10 p.m. each night, trains will single-track between Foggy Bottom and Arlington Cemetery for prep work associated with an upcoming NTSB-recommended switch replacement project. Trains will also single-track between Eastern Market and Stadium-Armory for station rehabilitation and track work. After 10 p.m., trains will operate every 30-35 minutes. Customers should allow 15-20 minutes of additional travel time.

Green Line

• Through Friday, from 10 a.m. to 2 p.m. each day, trains will single-track between Southern Avenue and Naylor Road for rail and fastener renewal. Customers should allow about 10 minutes of additional travel time.

Follow WTOP on Twitter.

(Copyright 2012 by WTOP. All Rights Reserved.)