Exceptions include the Front Street interchange in Sarnia and the Highway 40 interchange which is a Parclo B - 4 .
Sarnia is a hybrid of a diamond and Parclo B2 interchange ( previously a Parclo AB2 until the mid-2000s ) .
Exceptions include the Front Street interchange in Sarnia , which is a hybrid of a diamond and Parclo B2 interchange ( previously a Parclo AB2 until the mid-2000s ) , and the Highway 40 interchange which is a Parclo B - 4 .