In line-topping P90D form with a Ludicrous mode, the Tesla Model X is the quickest SUV we’ve ever tested. Acceleration in this electric three-row SUV comes in an incredible seconds in Motor Trend testing . What’s also incredible, though, is the price of the Model X we drove, or $135,400 as tested. But you can get lesser Model Xs for under $100,000, and as with the Model S on which it’s based, the SUV drives well. Those flashy second-row falcon doors are good for impressing the neighbors, but we found them a bit gimmicky. Then there are the second-row seats, which are mounted on single-point floor mounts to give more legroom and under-seat storage space.
A side dump truck (SDT) consists of a 3-axle tractor pulling a 2-axle semi-trailer. It has hydraulic rams which tilt the dump body onto its side, spilling the material to either the left or right side of the trailer. The key advantages of the side dump are that it allows rapid unloading and can carry more weight in the western United States. In addition, it is almost immune to upset (tipping over) while dumping, unlike the semi end dumps which are very prone to tipping over. It is, however, highly likely that a side dump trailer will tip over if dumping is stopped prematurely. Also, when dumping loose materials or cobble sized stone, the side dump can become stuck if the pile becomes wide enough to cover too much of the trailer's wheels. Trailers that dump at the appropriate angle (50° for example) avoid the problem of the dumped load fouling the path of the trailer wheels by dumping their loads further to the side of the truck, in some cases leaving sufficient clearance to walk between the dumped load and the trailer.