when traffic conditions and the skill of both riders allow it.
One could find street bikes at any kind of bike stores. Cyclesoft, and Motorcyclistonline are two of the best sites you could find on the internet. Check them out!
are equal in width and polarity
A dividing ridge between two basins is a high point or elevation that separates the watersheds of two separate drainage areas. It determines the direction in which water flows, with water on one side of the ridge flowing into one basin and water on the other side flowing into a different basin.
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I think the first one is correct. Because comparative forms (cooler) are used to compare two things (two sides of the street). The superlative ( coolest) is for three or more.
Broadway is a street running from lower Manhattan along the West Side to Harlem. Most of the early theaters were on, or at least within two blocks on either side of, that street.
An arête is typically formed when two glaciers erode parallel U-shaped valleys. The arête is a thin, sharp ridge of rock that is separating the two valleys.
are equal in width and polarity
The two main types of dirt bikes are motocross and trail bikes. Yamaha, Kawasaki, and Honda all make these types of dirt bikes.
A "col" is a saddle-like, low point or pass between two mountain peaks or hills. It is often a narrow, elevated ridge with steep slopes on either side. It is commonly used by hikers and climbers to traverse from one side of a mountain to the other.
Finland: It is only legal to park on the left side of the road on a one way street. On a two way street you have to turn your car around and come back to park on the side that was on your left.
A tandem bike has two seats, and two handle bars. The seats are NOT side by side, and the only the front steering wheel can turn. They make tandem bicycles for adults, but there are a lot of tandem bikes that are designed for an adult in front and a child in the back.