It's not true. The road had a planned expansion to go to 4 lanes in each direction in 1977. It was blocked by Arlington County, and the only new construction they've done for 40 years is extending the exit lanes. It's so ridiculously under the needed capacity that all of the canards about not being able to build your way out of traffic don't apply.
> "It's not true. The road had a planned expansion to go to 4 lanes in each direction in 1977..."
Doesn't matter that it was planned a long time ago and blocked. Regardless of how or when it was initially built, the cost to build it has to be compensated somehow.