do we know what's drivie ing th increase. >> reporter: a couple of things. lower gas prices and airfare are the main contributing factors to this projected increase. in fact, triple a says this will be the highest most traveled 4th of july holiday weekend ever. 44.2 million americans plan to take off for the hol tiday weekd in our area nearly 600,000 taking a trip. up 3% from last year. gas prices 5 cents less than last year. majority of people traveling by car from our area. very busy thursday or friday rather through tuesday. reporting live now. pamela osborne. nbc 10 news. >>> today philadelphia international airport join with wawa welcome america to host the official unveiling of the airport new photo exhibit. called philadelphia. the nation's first world heritage city. celebrates the designation of world heritage site and part of the run up to festival which begins tomorrow. things to do during the festival. see the sand sculptures. then on saturday, enjoy a mural arts. display of friends and scare. community day activities and free public space music p

. >> health care w drivi in the special election in georgia yesterday. in the end, a republican candidate won the most expensive house congressional election ever. john harwood is in atlanta with what the victory means for the white house economic agenda. >> four major take aways from the republican victory yesterday. first of all, the republican political machinery is is operate iing at a high level. they faced challen in six, rose to that challenge. second of all, democrats can look forward to a good environment in the 2018 midterm, not a bad one. even though they've lost the specials in 2017, they all took place in republican leaning districts and democrats closed the gap in those districts. third, though democrats will gain seats in 2018, they have not shown they can break there is in the kind of republican leaning districts they need in house. this is one of those districts. finally, this cooutcome is positive firefighter repht are o move on health care as well as tax reform. and republican leaders know this will calm their member, make it easier fo

road rage and aggressive drivi just last week in california, this motorcyclist appears to kick a car, which then swerves. a chain reaction crash ensues. there is a reward for any information leading to the gunman's capture. police are now searching in three states. tom? >> eva, thank you. and you can learn about avoiding road rage incidents, on tonight's "20/20" at 10:00 p.m. eastern. >>> next to the father, the suspect contacting his daughter online and going to her home. the family ready and waiting. here's clayton sandell. >> reporter: when this 33-year-old man walked into this del city, oklahoma, backyard, what he got wasn't what he was expecting. tackled by the family of a 15-year-old girl he was coming to meet. >> he had planned everything with her. and he was ready. and we were, too. >> reporter: her father, who doesn't want to use his name, says he wati illicit rendezvous by using an app called family time that monitored the teen's phone. he notified police who said they couldn't help until the man did something. so dad decided to set up a sting. >> the father took it upon him