Lawrenceburg, about 15 miles (24 km) south of the I-64 crossing. This particular interchange is a conversion from a four-loop design at the location of one of the toll booths on the Bluegrass Parkway before its conversion into a freeway. Toll booths were located directly below US 127; through traffic used the through lanes, while both entering and exiting traffic shared a lane directly to the right of the through lanes. The old design was standard for interchanges at toll booths in Kentucky's parkway system of controlled-access toll roads; even though tolls have been removed from all of the roads, many of the old designs still exist at former toll booth sites. The Taylorsville Road interchange with the I-264 Watterson Expressway in Louisville. The B4 design was necessary in this case because of the angle at which Taylorsville Road crosses the Watterson. The US 83 interchange on I-80 in North Platte, Nebraska, has also recently been upgraded to a B4 from a diamond. The parclo B4 is less common in Ontario than the parclo A4, with the only examples being the following: Highway 406/St. David's Road interchange on the border of St. Catharines and Thorold Highway 402/Highway 40 interchange in Sarnia Highway 17/Municipal Road 55 interchange in Sudbury the interchange at Lauzon Parkway and the E. C. Row Expressway in Windsor There are two such interchanges in Saskatoon, Saskatchewan, along Circle Drive, at College Drive and Attirdge Drive/Preston Avenue N. The following B4 interchanges were changed from full cloverleafs: U.S. 73/K-7 at U.S. 24/U.S. 40/State Avenue near Basehor, Kansas was changed in 2008. I-695 at U.S. 40 in Catonsville, Maryland was changed in 2005/2006. U.S. 14/U.S. 52 at Civic Center Drive in Rochester, Minnesota was changed from a cloverleaf in 2004/2005. I-90/Ohio 2 at Ohio 57 near Elyria, Ohio was also changed in the mid 1990s. I-5 at South 38th Street in Tacoma, Washington was changed in the mid 1990s. Some parclo B4 interchanges such as the intersection of Interstate 40 and U.S. Route 401 in Raleigh, North Carolina, have been fitted with signals at each ramp meeting the arterial in order to allow more lanes on the offramps. This technique along with the ability to provide two-way signal progression along the arterial allows the parclo B4 to handle an extremely high flow of traffic along the arterial. Other variations Parclo designs with only two quadrants are commonly referred to