What are the biggest logistical bottlenecks in the United States ?

The I-95 corridor
I-95 passes through the most densely populated part of the United States. In the north, it’s fully constrained on both sides. It contains the busiest rail corridor in the country too.
And the busiest air traffic routes too
Connecticut calculated that business losses due to congestion on I-95 were in the range of $1.4 billion a year.
The corridor is badly in need of an upgrade. One of the problems is that cities have expanded to meet I-95 when it tries to skirt around cities, which means it’s not really the best way to travel if your going any distance
Here’s the metro DC area. The District of Columbia itself is outlined in black
I -95 enters at top right and exits at bottom left. It cuts right through the most congested part of the metro area.
This corridor is badly in need of an upgrade. Freight rail should be moved further inland, which would allow more frequent passenger service and an upgrade of the line. One of the reasons there is no high-speed rail in this corridor is because there’s no land to build it on. It would probably cost trillions to appropriate it and there would be massive political opposition. New ring roads should be built to by-pass crowded metro areas. New rail capacity would also take a lot of strain off of the region’s airports, which are all running at full capacity.

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