If there was a sure sign that many travelers will take to the skies this Independence Day, it might be this Tweet from the Transportation Security Administration about a record-breaking number of people being screened a full week before July 4. TSA officials said 83,687 passengers were screened at Newark Liberty International Airport on Thursday, the most ever. TSA, airline and Port Authority officials are expecting to see passenger volume take off from there on this official start of the summer travel season. Even the state Department of Transportation is warning drivers of heavy traffic on h…