Staff shortages and equipment failures at Newark Liberty International Airport have raised safety concerns in recent weeks.

Travel woes at Newark Airport continued Monday after a weekend featuring another radar outage, a ground stop and dozens of flight cancellations and delays. The FAA announced Newark was operating on a ground delay program,

While the AAA expects a record number of domestic fliers, the number of travelers flying locally, including through Newark Airport, has dropped this holiday weekend compared to this same time last year.

It’s been a brutal month for Newark Liberty International Airport, as telecommunications and radar outages have plagued one of the nation’s busiest airports, triggering delays and cancellations for thousands of passengers.

Newsday spoke to experts who said that the direct cause of Newark’s blackout was unique, but the region's other airports like Long Island MacArthur, LaGuardia and John F. Kennedy face some of the same underlying issues — like dated equipment and a long-term shortage of air traffic controllers.