Cyclists and other traffic can pass between the zones and cycling accounts for 50%+ of trips in Groningen (which reputedly has the third highest proportion of cycle traffic of any city). The Swedish city of Gothenburg uses a similar system of traffic cells. Another approach is to reduce the capacity to park cars.
In mathematics, mean has several different definitions depending on the context. In probability and statistics, mean and expected value are used synonymously to refer to one measure of the central tendency either of a probability distribution or of the random variable characterized by that distribution.
a statistician or mathematician would use the terms mean and average to refer to the sum of all values divided by the total number of values what you have called the average this especially true if you have a list of numbers