A trifecta of traffic and weather events this summeris highlighting what anyone who has been on Long Beach Island and tried to leave has experienced firsthand: It’s crowded. And not the typical crowded of past summers, but what is sure to be the beginning of the new normal on this barrier island.

In less than a month, Ship Bottom saw the effects of a fatal accident in the area of 11th Street and Long Beach Boulevard that snarled traffic in the borough and farther south for more than four hours;…