The new Wilson Gate Entry was designed to take the weight off the Main Gate Entry to provide another access point to base.
This entry is only open Monday through Friday from 5:30 to 8 in the morning but its open 24/7 for outbound traffic.
Right now only two of the five lanes are open because the gate is still under construction but traffic was still moving smoothly on opening day.
Marine Alex Prown said, "It looks unfinished. I live over by New River so it will be much more convenient."
"I think it will be really good for everybody who lives out towards the New River area. It will make everything a lot faster to be able to get to work instead of just being backed up at the front gate," said Marine Nicholas Werner.
"Normally it takes me about 30 to 45 minutes but now I just got here and it's maybe 15 at the most," said Jacksonville civilian Corey Lagan.
A Jacksonville transportation expert says it's too early to know how beneficial the Wilson Gate Entry will be, but it definitely helps increase capacity on Western and Lejeune Boulevard.
"Having this new gate again will redistribute some of that traffic so that we'll realize better traffic conditions throughout the city as a whole," said Transportation Services Administrator Anthony Prinz.
The entrance is formally named Wilson Boulevard after General Louis Hugh Wilson, Jr., a World War II recipient of the Medal of Honor and 26th Commandant of the Marine Corps.
The entire project is scheduled to be open in Winter 2015.