Subway or Bridge

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terry03
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Joined: Fri Aug 26, 2011 3:10 pm

Subway or Bridge

Post by terry03 » Fri Sep 23, 2011 8:28 am

This is probably a stupid question. I've been looking at articles about the track elevations in the Chicago area back in the 1910's and 1920's. Sometimes they call a crossing a subway and sometimes they call it a bridge. They all are bridges too me. What is the difference?

My grandfather worked for a construction company called "Bates & Rogers Construction Corporation" from Chicago. In their brochure they state that they built all of the bridges and most of the subways for 50 miles into Chicago. I can't see what the difference is. Anybody out there know what the difference is?

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Ken V
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Location: Toronto, ON

Re: Subway or Bridge

Post by Ken V » Fri Sep 23, 2011 10:32 pm

I don't know if this is the real answer but my feeling is if you build it over something that's already there, it's a bridge, and if you dig (tunnel) under something that's there, it's a subway. Does that make sense?
Ken V. Moderator: Most things Canadian.
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terry03
Posts: 52
Joined: Fri Aug 26, 2011 3:10 pm

Re: Subway or Bridge

Post by terry03 » Sat Sep 24, 2011 7:43 am

Ken V wrote:I don't know if this is the real answer but my feeling is if you build it over something that's already there, it's a bridge, and if you dig (tunnel) under something that's there, it's a subway. Does that make sense?
When the Illinois Central raised their tracks in the Chicago area they built a fill. When they came to a street they built a bridge across the street. Almost in every case they didn't call it a bridge. They called it a subway. I worked in construction for 50 years. I call it a bridge. I think maybe that translation has gotten lost through the years.

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