At a Glance

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Wednesday, July 18, 2007

Highway connections: Interstates 95, 395, 495 and Route 644

Ramps and bridges: 50

Number of lanes at widest point: 24

Largest bridge: Flyover ramp from inner loop of Capital Beltway to I-95 south is one mile long and 100 feet high

Signs: 200

Cubic yards of concrete: 100,000

Tons of asphalt: 750,000

Tons of grass seed: 25

Miles of sound walls: 12

Number of reflective pavement markers: 7,000

Gallons of paint for lane striping: 1,500

Vehicles a day: 430,000

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© 2007 The Washington Post Company

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