Substandard Interchanges

[silverback1065]

Besides Breezewood and i-93 in NH, what are some good examples of substandard interstate interchanges or general features?  one that comes to mind is I-75 in mackanaw city https://www.google.com/maps/@45.7829082,-84.7316542,16.8z it's even substandard on the bridge.

[dlsterner]

Besides Breezewood and i-93 in NH, what are some good examples of substandard interstate interchanges or general features?  one that comes to mind is I-75 in mackanaw city https://www.google.com/maps/@45.7829082,-84.7316542,16.8z it's even substandard on the bridge.

Among substandard features:
The Thousand Island Bridge in New York carries I-81, even though the bridge is only two lanes.
I-70 in Wheeling WV goes through a two lane tunnel.
I-40 westbound in NC (near the Tennessee border) has a couple of RIRO junctions with service roads.

I'm sure there are others.

[Beltway]

I-70 in Wheeling WV goes through a two lane tunnel.

The tunnel is 4 lanes in 2 tubes, but the interchange just west of the tunnel has lane drops to one lane each way on I-70.

Is this ever going to be upgraded to a full 4-lane standard?

[GaryV]

Another one in Michigan:  I-75 to I-75 in Detroit.  Slow 2-lane ramps to/from the Chrysler and Fisher Freeways, for thru traffic.

[catch22]

Another one in Michigan:  I-75 to I-75 in Detroit.  Slow 2-lane ramps to/from the Chrysler and Fisher Freeways, for thru traffic.

Also in Michigan:  The I-94/M-10 interchange in Detroit.  Those 4 left-exit/left-merge ramps are the pits.  When I worked in Downtown Detroit, I had to navigate this mess every work day.

[Finrod]

one that comes to mind is I-75 in mackanaw city https://www.google.com/maps/@45.7829082,-84.7316542,16.8z it's even substandard on the bridge.

I can't see how the Mackinac Bridge could ever have its shoulders widened to full interstate specifications, because they'd have to redo the main bridge towers just for starters, and that would be prohibitively expensive:

https://www.google.com/maps/@45.8099856,-84.7288481,3a,75y,87.13t/data=!3m6!1e1!3m4!1swN5KHKB13Ib7AADTKEHVAw!2e0!7i13312!8i6656

[silverback1065]

Besides Breezewood and i-93 in NH, what are some good examples of substandard interstate interchanges or general features?  one that comes to mind is I-75 in mackanaw city https://www.google.com/maps/@45.7829082,-84.7316542,16.8z it's even substandard on the bridge.

Among substandard features:
The Thousand Island Bridge in New York carries I-81, even though the bridge is only two lanes.
I-70 in Wheeling WV goes through a two lane tunnel.
I-40 westbound in NC (near the Tennessee border) has a couple of RIRO junctions with service roads.

I'm sure there are others.

Google says the thousand island bridge is in canada.

[hotdogPi]

Besides Breezewood and i-93 in NH, what are some good examples of substandard interstate interchanges or general features?  one that comes to mind is I-75 in mackanaw city https://www.google.com/maps/@45.7829082,-84.7316542,16.8z it's even substandard on the bridge.

Among substandard features:
The Thousand Island Bridge in New York carries I-81, even though the bridge is only two lanes.
I-70 in Wheeling WV goes through a two lane tunnel.
I-40 westbound in NC (near the Tennessee border) has a couple of RIRO junctions with service roads.

I'm sure there are others.

Google says the thousand island bridge is in canada.

It crosses the border.

[StogieGuy7]

Basically, any freeway interchange where the on-ramps have a stop sign rather than an acceleration and merging zone is substandard.  And there are many older freeways out there that have such designs, from California to Massachusetts.

[vdeane]

Besides Breezewood and i-93 in NH, what are some good examples of substandard interstate interchanges or general features?  one that comes to mind is I-75 in mackanaw city https://www.google.com/maps/@45.7829082,-84.7316542,16.8z it's even substandard on the bridge.

Among substandard features:
The Thousand Island Bridge in New York carries I-81, even though the bridge is only two lanes.
I-70 in Wheeling WV goes through a two lane tunnel.
I-40 westbound in NC (near the Tennessee border) has a couple of RIRO junctions with service roads.

I'm sure there are others.

Google says the thousand island bridge is in canada.

The Thousand Islands Bridge is technically a system.  There are two main bridges - the American Span on I-81 between the US mainland and Wellesley Island, and the Canadian Span on ON 137 between Hill Island and the Canadian mainland.  Between the two islands are a pair of smaller bridges the size of a typical interstate underpass - those are the ones that cross the border.  Wellesley Island is decently large - I-81 is on it for 3-4 miles and meets interstate standards on it, even though it narrows down to two 11' lanes for the bridge.

Fun fact: the Canadian Span is the only place in Canada where you can pay a toll with E-ZPass without crossing the border.

[hbelkins]

The I-55 northbound cloverleaf in Memphis.

[triplemultiplex]

This will get extremely long if we try to list every interchange on the interstate system that doesn't meet current design standards.
Some states literally have hundreds.
I pan around New England and virtually every interchange is an antiquated mess.

[kphoger]

This will get extremely long if we try to list every interchange on the interstate system that doesn't meet current design standards.

It's also already been done.

MODS:  I suggest a thread merge with this one.

[BrianP]

This will get extremely long if we try to list every interchange on the interstate system that doesn't meet current design standards.
Some states literally have hundreds.
I pan around New England and virtually every interchange is an antiquated mess.

The original question did not ask for an exhaustive list. It just asked for notable examples. 

[dlsterner]

Besides Breezewood and i-93 in NH, what are some good examples of substandard interstate interchanges or general features?  one that comes to mind is I-75 in mackanaw city https://www.google.com/maps/@45.7829082,-84.7316542,16.8z it's even substandard on the bridge.

Among substandard features:
The Thousand Island Bridge in New York carries I-81, even though the bridge is only two lanes.
I-70 in Wheeling WV goes through a two lane tunnel.
I-40 westbound in NC (near the Tennessee border) has a couple of RIRO junctions with service roads.

I'm sure there are others.

Google says the thousand island bridge is in canada.

The Thousand Islands Bridge is technically a system.  There are two main bridges - the American Span on I-81 between the US mainland and Wellesley Island, and the Canadian Span on ON 137 between Hill Island and the Canadian mainland.  Between the two islands are a pair of smaller bridges the size of a typical interstate underpass - those are the ones that cross the border.  Wellesley Island is decently large - I-81 is on it for 3-4 miles and meets interstate standards on it, even though it narrows down to two 11' lanes for the bridge.

Fun fact: the Canadian Span is the only place in Canada where you can pay a toll with E-ZPass without crossing the border.

Yes, I should have been more specific.  I meant the bridge between Wellesley Island and the mainland US, which is part of the Thousand Islands Bridge system.  Entirely within the US, designated as part of I-81, and two lanes wide.

[dlsterner]

I-70 in Wheeling WV goes through a two lane tunnel.

The tunnel is 4 lanes in 2 tubes, but the interchange just west of the tunnel has lane drops to one lane each way on I-70.

Is this ever going to be upgraded to a full 4-lane standard?

Beltway, you are correct.  I've only personally travelled through them once a number of years ago, and I guess my memory was a bit faulty.  As far as it being upgraded, I do not have any official information, but I would suspect that the existence of I-470 to the south would minimize the need for an I-70 upgrade.  Just my opinion.

[Beltway]

Beltway, you are correct.  I've only personally travelled through them once a number of years ago, and I guess my memory was a bit faulty.  As far as it being upgraded, I do not have any official information, but I would suspect that the existence of I-470 to the south would minimize the need for an I-70 upgrade.  Just my opinion.

I see that the I-70 Wheeling tunnel carries about 51,000 AADT with a 10% large truck percentage.

That level of traffic should cause serious congestion in peak hours on the 2-lane constriction.

[Revive 755]

For Illinois (not an exhaustive list)
* I-90 at I-39:  Particularly the low speed WB to SB ramp that dumps out onto the left side of I-39
* I-39 at US 20, western interchange:  Mainline I-39 goes through long single lane ramps
* I-94 at US 41 near the Wisconsin border:  Left side exit to SB US 41
* I-290 at Austin Avenue
* I-290 at IL 43
* I-290 at IL 171
* Palatine Road near Wolf Road:  The WB entrance could use a longer acceleration lane

[mrcmc888]

I-70 in Frederick, Maryland.  You have I-270 inbound traffic merging from the left, and an immediate exit for US 15/340, resulting in a three-way spaghetti junction that really is no good at preventing traffic.

[froggie]

I-93 in NH,

The interchanges are not substandard.  If you're referring to the 2-lane section through Franconia Notch, that isn't an interchange, nor is it substandard for the traffic level.

[ET21]

For Illinois (not an exhaustive list)
* I-90 at I-39:  Particularly the low speed WB to SB ramp that dumps out onto the left side of I-39
* I-39 at US 20, western interchange:  Mainline I-39 goes through long single lane ramps
* I-94 at US 41 near the Wisconsin border:  Left side exit to SB US 41
* I-290 at Austin Avenue
* I-290 at IL 43
* I-290 at IL 171
* Palatine Road near Wolf Road:  The WB entrance could use a longer acceleration lane

I'd argue many of those I-290 Ave exits between Mannheim and Austin are pretty bad. Not gonna lie I wonder if eliminating one or two of them would help traffic flow through that corridor (along with redoing the left exits of Austin and Harlem)

[silverback1065]

I-93 in NH,

The interchanges are not substandard.  If you're referring to the 2-lane section through Franconia Notch, that isn't an interchange, nor is it substandard for the traffic level.

that goes under the general features portion of my original comment.

[froggie]

^ I would argue it doesn't.  2 lanes is plenty adequate for I-93 traffic through the Notch, even on summer weekends.

If you're including "general features", we've had several threads on the subject.

[hbelkins]

Did they ever get the "no merge area" issues corrected at the I-70/I-81 interchange?

[US 89]

The ramps between I-80 and I-215 at their interchange east of Salt Lake City are an undivided 2-lane roadway that directly replaced the old SR 171. That interchange has a bunch of other outdated features including some very tight curves and narrow merges, but I'm not sure anything else in there is technically "substandard".