These roads name the baseball series between the Orioles and the ► Nationals.  
Houston has two of these entities, one of which is named for Sam Houston, while one of these in Las Vegas is named for Bruce Woodbury. These entities have aided development and growth in cities such as Dunwoody, Georgia and Carmel, Indiana. Foreign ones include the M25 and Beijing has five of these, while the longest in the United States is (*) Interstate 275, which is between five and fifteen miles from downtown Cincinnati. These roads name the baseball series between the Orioles and the ► Nationals.  The most famous one passes Tysons Corner, Virginia and metonymically separates government insiders from the rest of America. For 10 points, name this type of highway, such as Interstate 495 going around Washington, DC. 
Houston has two of these entities, one of which is named for Sam Houston, while one of these in Las Vegas is named for Bruce Woodbury.
Beltways (accept beltlines or circumferential highways or ring roads or anything that clearly conveys knowledge of a road going in a circle around a city)