Recently my engine company responded to a liquid nitrogen tanker on fire, on I-75 at about 0300 Hrs. After a quick review of the HazMat Guide book, I decided to close down I-75 northbound. The vehicle was parked in the median area between I-75 and the I-275 ramp. We did our best to shut down 3 lanes of traffic and a citizen tried to close down I-275 ramp. I pulled a 200 ft. pre-connect to the median of I-75 between northbound and southbound lanes to finish donning my SCBA mask. We had flame impingement on the tank. The fire was on the rearmost axel as I dropped to my knees to don my gear. A car made its way around the engine that was straddling 3 lanes of traffic and drove into the emergency lane where I was on my knees preparing to attack the fire. A breach in the tank developed and as I turned to hit the fire, this car just missed me by about 18 inches. This could have been tragic as my head was about bumper height. With the arrival of law enforcement which was summoned immediately on our arrival as well as a second engine for water supply and a battalion the entire northbound was secured and the fire extinguished without anymore “close calls”.