Mayor Bill de Blasio said New York City would start implementing checkpoints across the five boroughs to help enforce Gov. Andrew Cuomo's quarantine order for travelers from viral hotspots, citing the ongoing national COVID threat.

The measure announced Wednesday is the first significant effort by New York City specifically to help enforce the 14-day quarantine for travelers from 34 states and Puerto Rico. In revealing it, de Blasio said the state was "absolutely right" to impose the travel restriction in the first place. Cuomo announced it in late June.

"The checkpoints are going to send a very powerful message that this quarantine is serious. Even if we can't reach every single person I think it'll get the message across," de Blasio said. "We don't want to penalize people. We want to educate them, make sure they're following the rules."

Travelers who land at New York airports are required to fill out a form for contact tracing purposes. The same requirements apply for travelers coming to the state by car, train or bus -- though travelers who come by those means are more likely to slip through the cracks. The city will start a checkpoint at Penn Station on Thursday, facilitating the filling out of those forms and helping inform people. Others are planned for city bridges and tunnels; some checks will be randomized.

Failure to submit the form can result in mandatory quarantine and a $2,000 fine, while failure to comply with the overall order can incur up to a $10,000 fine. Read more at NBC NY