Watch Clemenger BBDO's gut-wrenching TV spot for the New Zealand Transport Agency's safer driving campaign in the video above.

Australian creative agency Clemenger BBDO has created a shocking, powerful and effective TV advert for the New Zealand Transport Agency as part of an anti-speeding campaign.

Using time freeze visual effects, the 60-second film shows two drivers reflecting on their actions as time slows to a halt before returning to a reality in which the oncoming vehicle is travelling above the speed limit.

The ad has had almost seven million views on YouTube since it premiered earlier this month.

Clemenger BBDO's previous clients include Mercedes-Benz, Dulux and BUPA.