CHATTANOOGA (WRCB) -- This weekend there are bargains around every corner, from Alabama to Michigan. 

The World's Longest Yard Sale stretches 650 miles, along Highway 127 and Lookout Mountain Parkway.

While shoppers look for deals, local residents and business owners are bracing for a traffic nightmare.

"Cookies and Kool-Aid," says Ada Pratt.

Its a refreshing menu, 7 year old Pratt and her best friend, Megan Underwood, are hoping will draw a crowd.

"Come buy some lemonade," says Underwood.

A few miles north, the steady stream of traffic isn't as welcome.

"It just gets a little inconvenient when you are trying to get to your job, or trying to get errands run," says Susan Martinez of Superior Air Systems, LLC.

Car loads of bargain shoppers are flooding US-127, for the annual World's Largest Yard Sale.

Vendors line the highway, from Alabama to Michigan, making parking a nightmare for this Signal Mountain business.

"Its routine, we know its coming so we know to prepare for it but it does get a little frustrating," says Martinez.

Logan Dorris sets up shop every year and does well selling his metal works of art but he admits the traffic is a headache. 

"At some point the Sheriff's Department usually sends somebody out to direct traffic," says Dorris.

Not today, Donna Sisk and Pricilla Wilder traveled from out of state. They say dodging traffic seems to be part of the hunt.

"Pretty busy, this is a busy spot," says Sisk.

"It is quite busy and people don't want to slow down for you," says Wilder.

While vendors tell stories of close calls, the most serious incident happened in 1998.

When an 18 wheeler, traveling down Cagle Mountain, in Sequatchie County, lost control plowing into vendors and vehicles. Two people died, many more were injured. Its a scene residents hope to never see again.

"I don't blame them but its one weekend a year," says Dorris. "You've just got to be careful."

The World's Longest Yard Sale runs through Sunday.

On its website it encourages shoppers to be cautious, and look out for pedestrians.

Several law enforcement agencies will be out this weekend to patrol and help with traffic.