I guarantee France have stronger unions and regulations, and still managed the GPE. 3 years late and with 20% cost overrun, sure, but to be fair, they had to deal with floods twice, which wasn't planned and broke equipment and reseted some tunnels.

20% cost overrun is nothing if you look at the typical cost overrun of a US infrastructure project. UES extension in NYC a prime example of that. And 3 years late? How about 50 years late?