1 The average annual snowfall in Minnesota varies from 36 inches in the southwest to more than 70 inches along the Lake Superior snow belt..
A bollard is a sturdy, short, vertical post. Although it originally described a post on a ship or quay used principally for mooring boats, the word is now used, primarily in British English, to describe posts installed to control road traffic and posts designed to prevent ram raiding and car ramming attacks.
A bell bollard is a style of bollard designed to deflect vehicle tires. The wheel mounts the lower part of the bollard and is deflected by its increasing slope. Such bollards are effective against heavy goods vehicles that may damage or destroy conventional bollards or other types of street furniture. A variant on the bell bollard is the Martello bollard, its sloped shape inspired by the profile of historic Martello towers. Removable bollards Bollards may be hinged at ground level, allowing them to be folded flat to permit vehicles to drive over them.