The two-lane stretch from Paso Robles to Cholame was once known as "Blood Alley" for the large number of crashes, mainly head-on collisions, among the high volume of commuters, truckers, and tourists.

It added a third lane and an exit lane, changing the two-lane stretch into four lanes.

For an $85 million project in Trenton, to turn a two-lane stretch of Route 29 into a four-lane road with full shoulders, the job will delay the average commuter about 10 minutes a trip, or more than 80 hours a year.

The long, continuous bridge span between Wellesley Island and the United States mainland is one of the few remaining two-lane stretches left on the Interstate Highway System.

The original two-lane stretch of U.S. Highway 33, now County Road 33-A, runs through the community.

After a few miles of uninteresting countryside on Route 26, a busy two-lane stretch of asphalt that links the coast with Canada, a roadside sign appears, announcing the Sabbathday Lake Shaker community.

Highway 43 was (and still is) one of Alberta's most dangerous highways, especially where there are still two-lane stretches not yet twinned.

At one point Harry started speeding, like kids will do, down a steep, two-lane stretch of mountain blacktop.

Originally a two-lane stretch, a widening project took place in the 1970s, increasing the road to four lanes.

Along the two-lane stretch, there are many large oaks and historic plantations.