Quadratics

Baltimore Harbor Tunnel**
 * Taylor, Debbie, Dev

No the tunnel is not a parabolic shape. The tunnel is underground, which is why it is shaped that way. It carries the harbor tunnel thruway, under the Patapsco River. The tunnel was constructed to stop the “Baltimore bottle neck.” In addition, it was made to stop traffic on the streets and there was only one direct route between Philadelphia and the south. sites- [|http://en.wikipedia.org/wiki/Interstate_895_(Maryland)] http://www.ce.jhu.edu/mdcive/harbor.htm
 * Construction (Taylor)**


 * Facts (Debbie)

-** 4 Lanes (22 ft wide) - **Clearance Height:** 14 ft (13 ft 6 in prohibited) - There are no shoulders or offsets to these tunnels. - There is no physical barrier between lanes, just a double yellow line. This is a dual tunnel and there is a wall that seperates the two. They travel in opposing directions (2 lanes each). - **Height of the Tallest point in the Tunnel:** We weren't able to find this specific answer. But we did find that the tunnels range from 50 to 101 feet below ground.

sites- http://www.mdta.state.md.us/mdta/documents/harbor.pdf http://www.tollroadsnews.com/node/3285 http://en.wikipedia.org/wiki/Balitmore_Harbor_Tunnel

~Opened On November 29,1957 ~Construction began in 1955 ~It was built because it cost less than building a bridge and the cost of the twin - tube tunnel could be supported by the toll revenues it would generate. ~ Was updated January 9, 2006 ~ There haven't been any problems with the tunnel since it was built ~ The original cost of the tunnel was $144 million The original toll to go through/ over it when it was first opened was 40 cents ~There is still a toll to go through/ over it now ~ It is roughly around 8 dollars
 * History** ( Dev)

sites- http://www.mdta.state.md.us/mdta/Documents/harbor.pdf http://www.ce.jhu.edu/mdcive/harbor.htm