Using the Canadian postal code system as an example, the top level's binding concept is the postal district, and consists of 18 objects (letters). The next level down is the zone, where the objects are the digits 0â9. This is an example of an overlapping hierarchy, because each of these 10 objects has 18 parents.
The refreshed 2014 Buick Regal GS can now be had with all-wheel drive, though the added grip does come at the expense of a few horsepower. We already sampled the 2014 Regal GS and walked away mostly impressed, but now itâs time to verify how the sedanâs powertrain changes affect its performance numbers.
And although some of the sales slump is related to GMâs unwillingness to give away its vehicles with huge incentives (such as the 2014 Silverado and Sierra), a lot of it also has to do with product. And we wonder how much business The General is ignoring by not offering all-wheel drive on more of its core models. For instance, not one vehicle of Chevroletâs core car vehicle lineup offers all-wheel drive, including the Spark, Sonic, Cruze, Malibu, or Impala.