All Metrorail lines will be affected by track work on Saturday and Sunday, according to Metro officials.

We see school buses pretty much every day when school is in session. Day in and day out. But, have you wondered why school buses are yellow, and not a color like bright green?

Why are school buses yellow? ... and blue buses as a way of promoting patriotism among students. ... a reported “50 shades ranging from lemon yellow to deep orange-red.” ...

We see school buses pretty much every day when school is in session. Day in and day out. But, have you wondered why school buses are yellow, and not a color like bright green?

We see school buses pretty much every day when school is in session. Day in and day out. But, have you wondered why school buses are yellow, and not a color like bright green?

Metro holiday closures could cause delays on the Blue, Orange, ... Free shuttle buses will move riders between Foggy Bottom and ... Metro will be increasing service on the Green and Yellow lines.

Green and Yellow line trains will run every 8 minutes all day. Blue, Orange, and Silver Line trains will operate every 12 minutes during the day and every 15 minutes after 9:30 p.m. Blue Line ...

We see school buses pretty much every day when school is in session. Day in and day out. But, have you wondered why school buses are yellow, and not a color like bright green?

You probably see school buses out and about pretty much every day when school is in session. But have you wondered why school buses are yellow and not a color like bright green?

We see school buses pretty much every day when school is in session. Day in and day out. But, have you wondered why school buses are yellow, and not a color like bright green?

We see school buses pretty much every day when school is in session. Day in and day out. But, have you wondered why school buses are yellow, and not a color like bright green?

We see school buses pretty much every day when school is in session. Day in and day out. But, have you wondered why school buses are yellow, and not a color like bright green?