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Old 12-14-2009, 12:48 PM
 
Location: Bayou City
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Here in Houston, it would have to be US 59. I think it averages like upwards of 350K cars a day. I dare say it's the busiest in the entire state. Accidents abound. And rush hour? Forget about it.
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Old 12-14-2009, 12:51 PM
 
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Considering some freeways are 16 lanes or more wide in Houston, I'd say they are possibly the nation's widest.
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Old 12-14-2009, 02:41 PM
 
Location: Chicago, Il
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Interstate 270 is St. Louis' busiest. Interstate 64 is not far behind.
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Old 12-14-2009, 02:59 PM
Status: "Nobody's right if everybody's wrong" (set 26 days ago)
 
Location: New Albany, Indiana (Greater Louisville)
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I-75/71 in Northern Kentucky. It's has the highest number of semi trucks of any road in the nation, averaging 47,000 trucks and 450,000 cars per day

Big trucks, big challenges | cincinnati.com | Cincinnati.Com
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Old 12-14-2009, 03:58 PM
 
Location: New Orleans, United States
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The I-10 is the busiest, probably followed by I-12.
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Old 12-14-2009, 04:20 PM
 
Location: Germantown, MD
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The DC Beltway (I-495), but I-270 is wider (7 lanes in each direction at one point).
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Old 12-14-2009, 04:38 PM
 
Location: Northridge, Los Angeles, CA
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From: 2008 Traffic Volumes on the California State Highway System

This is for the state of California
(These are 2007 Statistics)
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Old 12-14-2009, 05:00 PM
 
Location: SW Pennsylvania
821 posts, read 1,254,441 times
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Quote:
Originally Posted by censusdata View Post
I-75/71 in Northern Kentucky. It's has the highest number of semi trucks of any road in the nation, averaging 47,000 trucks and 450,000 cars per day

Big trucks, big challenges | cincinnati.com | Cincinnati.Com
Oh boy...I hate I-75 going through Kentucky and Ohio....semi trucks galore! Lots of bad drivers through there too.

Also in southern Kentucky, I-75 is rather hilly and busy.

As for my state of Pennsylvania, I imagine the busiest highways are in the Philadelphia area. But sw PA has a fair amount of traffic, especially on I-70.

In West Virginia, the I-64 region between Huntington and Charleston is rather busy. I-79 between Clarksburg and the Pennsylvania line is busy at times. If I'm not mistaken, the route 50 interchange at Clarksburg is the busiest in the state.
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Old 12-14-2009, 05:03 PM
 
Location: Dallas-Fort Worth Metroplex
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Dallas-Fort Worth I-35E 267,250
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Old 12-14-2009, 08:07 PM
 
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Illinois' would have to be the 4 expressways that draw into the circle interchange in downtown Chicago.

The Kennedy has 300,000 vehicles per day coming in from the north, the Eisenhower has 210,000 coming in from the west, the Stevenson has 200,000 coming in from the southwest, and the Dan Ryan has 230,000 coming in from the south.

The impressive factor is that these expressways are only 4 lanes in each direction except for the Dan Ryan which is 7 lanes in each direction. The Kennedy also has 2 reversible lanes that switch depending on traffic. The end result though is congestion at most hours of the day. 36 lanes total for 940,000 vehicles coming or going.
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