Researchers estimate that tidal nuisance flooding threatens over 7,500 miles of roadway along the East Coast; 400 miles of which is interstate road. Researchers also estimate that this flooding causes over 100 million hours of delays each year.
“As tidal coastal flooding increases in the coming years, there will also be issues with the transportation infrastructure,” said Jennifer Jacobs, professor of civil and environmental engineering at UNH. “In the future, with rising sea levels, we expect to see more frequent issues, more damage, and impact to roadways even farther inland.
You can read more from her interview in the article linked below.