It cruises at 180 nautical miles per hour (207 mph) but is also easy to fly, and especially easy to land.

FORBES: I Love Jets

His client's decision to trigger the emergency brake lowered the train's speed to 45 miles per hour from 73 mph and likely saved lives, Mr. Cahill said.

WSJ: Probe of Metro-North Derailment in Connecticut Focuses on Rail

The top speed in EV mode is 85 miles per hour, which is 25 mph better than the Prius plug-in.

FORBES: C-Max: Ford Makes A Great Car -- And Gets Slammed Anyway

The site also provides three options for walking speed slow (two miles per hour), medium (3 mph) and fast (4 mph).

WSJ: Timing an Urban Stroll Isn't a Walk in the Park

Most notably, it found that drivers in just about every state stay within the speed limit on average, with only Mississippi edging 0.1 miles per hour over the top speed limit of 70 MPH.

ENGADGET: TomTom data finds drivers aren't speeding much, are being watched

It can accelerate from 0 to 60 miles per hour in 2.8 seconds and hit a top speed of 220 mph.

FORBES: Lamborghini's New Veneno Among Most Expensive Cars Ever Made

From a research station operated by the National Science Foundation called Summit Camp, a spot where the ice sheet is about 2 miles thick, GROVER will crawl at an average speed of 1.2 mph (2 kilometers per hour).

ENGADGET: NASA's GROVER eco-rover to examine Greenland's ice sheet (video)

Speed limits have gone from 55 miles per hour, when the test was invented in 1975, to as high as 75 mph.

FORBES: Fuel Economy Sticker Shock