By Dušan Teodorović Ph.D., Katarina Vukadinović (auth.)

When fixing real-life engineering difficulties, linguistic info is usually encountered that's usually demanding to quantify utilizing "classical" mathematical concepts. This linguistic info represents subjective wisdom. during the assumptions made through the analyst whilst forming the mathematical version, the linguistic info is frequently overlooked. nonetheless, quite a lot of site visitors and transportation engineering parameters are characterised via uncertainty, subjectivity, imprecision, and ambiguity. Human operators, dispatchers, drivers, and passengers use this subjective wisdom or linguistic details each day while making judgements. judgements approximately course selection, mode of transportation, most fitted departure time, or dispatching vehicles are made through drivers, passengers, or dispatchers. In each one case the choice maker is a human. the surroundings during which a human professional (human controller) makes judgements is often complicated, making it tricky to formulate an appropriate mathematical version. hence, the improvement of fuzzy common sense platforms turns out justified in such events. In definite occasions we settle for linguistic details even more simply than numerical info. within the comparable vein, we're completely able to accepting approximate numerical values and making judgements according to them. In various circumstances we use approximate numerical values solely. it's going to be emphasised that the subjective estimates of other site visitors parameters differs from dispatcher to dispatcher, driving force to motive force, and passenger to passenger.