A CONSTANT cause for consternation for Grafton residents is motorists ignoring the 'zipper' rule when entering the Grafton Bridge.

It involves vehicles in the left and right lanes merging alternately into one lane.

A Lower Clarence commuter had a close call during peak hour traffic on her way to work this morning when a car on her left suddenly merged in front of her, almost clipping the front of her car.

She had to slam on the brakes to avoid an accident and was dismayed by the other driver's behaviour.

"You do the crawl as per normal, then obey the unspoken law that as you get closer to the bridge and start seeing the arrows you stay back and give enough space for one car to merge," she said.

"But this red car who was virtually aligned with me decided they wanted to come across to my lane and I had to hit the brakes because they were hell bent on coming across.

The zipper effect is a well-documented bugbear in the Clarence Valley. What other road etiquette issues get your blood fuming?

"I just thought thank god it's Friday and I don't have to drive this s*** bridge again until next Tuesday," the woman said.

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Grafton Bridge times blow out at peak hours

ARE you one of those unfortunate souls forced to do the Grafton Bridge shuffle every morning and afternoon?

Get used to it, because until the new bridge opens in 2019, it's not going to get any better.

According to an RMS report the amount of traffic attempting to cross the Grafton Bridge during peak hours was expected to increase by 1.5% each year.

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