3 railroad bridges in Mobile AL which one goes where?

[Anonymous]

http://maps.google.com/?ie=UTF8&ll=30.723096,-88.051085&spn=0.027226,0.039911&t=k&om=1

In this picture there are 3 railroad bridges in the center...which one goes where?

[nanaimo73]

The easternmost bridge
http://terraserver.microsoft.com/image.aspx?T=4&S=10&Z=16&X=1998&Y=16998&W
is the CSX (L&N) mainline heading east to Montgomery and Pensacola.

Next is the former BN (AT&N, SLSF) bridge
http://terraserver.microsoft.com/image.aspx?T=4&S=10&Z=16&X=1995&Y=16997&W
on the former route north to Aliceville, and then Memphis. Almost all of the AT&N is gone.

This is the NS (southern) bridge
http://terraserver.microsoft.com/image.aspx?T=4&S=10&Z=16&X=1993&Y=16996&W
to Selma and Birmingham.

A little further west is the CN (ICG, GM&O) bridge
http://terraserver.microsoft.com/image.aspx?T=4&S=10&Z=16&X=1990&Y=16995&W
running north to Jackson, MS.