Speeding kills.

That's the message the New Zealand Transport Agency hopes viewers will take to heart after seeing their latest public service announcement. It serves as a stark reminder of what losing even a little extra reaction time can do.

In the ad, a man speeding down the road sees a car about to pull out in front of him. The two cars freeze as the drivers about to crash speak to one another. The driver about to be T-boned begs the speeding driver to avoid him, but he can't. He's going too fast. The ad ends reminding viewers to slow down. Other drivers make mistakes.

The video has now been viewed over 4 million times since it was posted six days ago. Commenters on the video seem to have taken the message to heart

"Sometimes I make mistakes, which is why I like reminders like this. Very well done," one YouTube user commented. "Driving time is boring time. Please help keep it that way."

"Crawls right under the skin," another posted.

Speeding is something we've all probably done behind the wheel, but speeding can kill. A 2009 National Highway Traffic Safety Administration study found that speed is one of the most prevalent factors in car crashes. In 2007, 31 percent of all fatal crashes were speeding related, resulting in 13,040 fatalities.