Which freeway boasts the most lanes in the United States?

The freeway that boasts the most lanes in the United States is found in San Diego, specifically along I-5 and I-805. This segment is notable for its extensive number of lanes due to the high traffic volumes that require larger capacity to maintain smooth flow. These freeways have been designed to accommodate both local and regional traffic needs, which is essential in densely populated urban areas like San Diego.

In contrast, while other freeways such as I-90 in Chicago and I-405 in Los Angeles are also significant in terms of lane count and congestion management, they do not reach the same capacity levels as the San Diego freeways. Additionally, I-78 in New Jersey, while busy, does not have the same design features aimed at maximizing lane availability that I-5 and I-805 do. This distinction makes the San Diego freeways a prime example of accommodating heavy traffic through well-planned infrastructure, leading to their recognition for having the most lanes in the country.