QUEENS, N.Y. - The Metropolitan Transportation Authority is investigating after another piece of debris fell from elevated subway tracks in Queens this week.

This time it was a six-inch rusty bolt that hit the sunroof of a moving car near the Queensboro Plaza station in Long Island City.

"It was slow traffic, so I wasn’t going too fast. Then I hear glass crashing. I look around. My windshield is fine, my mirrors are fine. My windows are fine. Then realized I have a sun roof, so I checked that out in the middle of traffic," said Phillip Garcia, the driver of the car.

It was just after 9 a.m. on Tuesday and Garcia had dropped off his 7-year-old daughter at school. He was driving back into Queens for work, taking the route he does every day and says he expected the usual traffic but not the damage. 

"Initially, I just thought it was a glass bottle that feel on top of the car but it wasn’t a glass bottle. It was the glass of my roof that was shattering. That was a bit of a shock to hear the impact," Garcia said.

It is not the first, or even the second or third time, debris has fallen from elevated train tracks in Queens. 

This year alone, there has been nearly a half a dozen instances in which falling debris has had close run-ins with pedestrians or drivers. 

Most notably in February, an entire wooden plank from the tracks of the number "7" train pierced the windshield of a car underneath Roosevelt Avenue near 65th Street in Woodside. 

That incident prompted an inspection of the line and the installation of netting under a very small section of the tracks. 

"It is only luck that has prevented someone from dying here. We are not going to remain lucky forever if this keeps happening at some point these bolts are going to fall down and hit someone in the head and that is a tragedy we can’t afford," said City Councilman Jimmy Van Bramer.

In a statement, the MTA says the bolt fell from the N and W line which shares the platform at Queensboro Plaza with the 7 train.

Communications Director Tim Minton added there are protective measures in place underneath the tracks designed to catch bolts and they are investigating why the bolt came loose and was not caught.

Garcia says he is just glad traffic was moving slow enough so that the bolt hit his back sunroof, instead of his windshield.

"If there was more traffic, that initial reaction could have cause a major accident you never know but luckily just the back," he added.

Garcia says the MTA has contacted him and asked him to reach out to their legal department to file a claim for the damage. 

There is funding allocated in the MTA's capital budget plan to instal netting underneath all elevated lines in the city to prevent instances just like Garcia’s. A time line for that however is unclear.