In this way, serious accidents can occur: the dams are only built to withstand a certain amount of water pressure; with the pressure from the sediment in some time the wall either explodes or water is caused to go above the dam, creating a waterfall; in both cases, a lot of organisms, including humans are in great danger. Dams are created in order to change the currents

It is the mathematical modeling of transportation systems (e.g., freeway junctions, arterial routes, roundabouts, downtown grid systems, etc.) through the application of computer software to better help plan, design and operate transportation systems. Simulation in transportation is important because it can study models too complicated for analytical or

The gravity model is the most popular of all the trip distribution models. It allows the effect of differing physical planning strategies, travel costs and transportation systems to be taken into account. Within it, existing data is analyzed in order to obtain a relationship between trip volumes and the generation. The cells within a trip matrix indicate the number of trips

The trip generation aims at predicting the total number of trips generated and attracted to each zone of the study area. In other words this stage answers the questions to / how many trips" originate at each zone, from the data on household and socioeconomic attributes. Purpose of the trip generation studies is to predict the number of the trips to be made

Trip generation models strive to predict the number of trips generated by a zone. These models try to mathematically describe the decision-to-travel phase of the sequential demand analysis procedure. It may be mentioned here that typically the term trip generation is used to mean trip production -- generally the trips made from households, and trip attraction