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- https://eng.libretexts.org/Bookshelves/Civil_Engineering/Fundamentals_of_Transportation/00%3A_Front_Matter
- https://eng.libretexts.org/Bookshelves/Civil_Engineering/Fundamentals_of_Transportation/03%3A_Modeling_Methods/3.05%3A_Destination_ChoiceOne of the key drawbacks to the application of many early models was the inability to take account of congested travel time on the road network in determining the probability of making a trip between ...One of the key drawbacks to the application of many early models was the inability to take account of congested travel time on the road network in determining the probability of making a trip between two locations. You are given the travel times between zones, trips originating at each zone (zone1 =15, zone 2=15) trips destined for each zone (zone 1=10, zone 2 = 20) and asked to use the classic gravity model \(f(C_{ij})=C_{ij}^{-2}\)
- https://eng.libretexts.org/Bookshelves/Civil_Engineering/Fundamentals_of_Transportation/06%3A_Traffice_Control/6.04%3A_Metering_and_AnalogsLimiting the number of vehicles that enter the freeway all at once increases the likelihood of each vehicle finding a suitable gap into which it can merge, thus decreasing the likelihood of shockwaves...Limiting the number of vehicles that enter the freeway all at once increases the likelihood of each vehicle finding a suitable gap into which it can merge, thus decreasing the likelihood of shockwaves being generated at freeway on-ramps. It turns out, the most efficient ramp metering control logic is the one metering the nearest entrance ramp(s) to a critical freeway section so as to keep the flow of this section strictly below capacity.
- https://eng.libretexts.org/Bookshelves/Civil_Engineering/Fundamentals_of_Transportation/05%3A_Traffic/5.03%3A_Queueing_and_Traffic_FlowThe difference is that the time required to cover distance is included when we make the better assumption, even under freeflow conditions it takes time to travel from the point where a vehicle entered...The difference is that the time required to cover distance is included when we make the better assumption, even under freeflow conditions it takes time to travel from the point where a vehicle entered the back of the queue to the point where it exits the front. One reason is if the vehicles in the queue could not travel fast enough so that the front of the following car could not reach the point of the front of the leading car in the time allotted the service rate.
- https://eng.libretexts.org/Bookshelves/Civil_Engineering/Fundamentals_of_Transportation/06%3A_Traffice_Control/6.03%3A_Traffic_Control_DevicesRoad signs in the United States are standardized in the Manual on Uniform Traffic Control Devices, the history of the evolution of this document is given in.Signs evolved from local practice, cities a...Road signs in the United States are standardized in the Manual on Uniform Traffic Control Devices, the history of the evolution of this document is given in.Signs evolved from local practice, cities and states copying neighbors, and inventing what they needed, and then later standardizing (first for rural and urban areas separately, and then jointly) after the value of coordination became apparent when automobile travelers crossed jurisdictional boundaries.
- https://eng.libretexts.org/Bookshelves/Civil_Engineering/Fundamentals_of_Transportation/04%3A_Transit/4.05%3A_Traveler_Information_for_TransitDelays, route changes, and confusing schedules are just a few of the concerns transit riders have. “After 3 minutes, a passenger waiting for a bus that is not coming expects more information and begin...Delays, route changes, and confusing schedules are just a few of the concerns transit riders have. “After 3 minutes, a passenger waiting for a bus that is not coming expects more information and begins to consider alternatives to fulfill their journey.”(US Department of Transportation, 2004) After walking or driving to a transit station that does not have adequate information, passengers do not know if they have just missed the last bus or when the next bus will arrive.
- https://eng.libretexts.org/Bookshelves/Civil_Engineering/Fundamentals_of_Transportation/03%3A_Modeling_Methods/3.01%3A_Agent-based_ModelingAfter comparing the path from node 3 to 5, the traveler's path information is updated to 1-3-5 since the shortest path for this path segment proposed by the node is shorter than that held by the trave...After comparing the path from node 3 to 5, the traveler's path information is updated to 1-3-5 since the shortest path for this path segment proposed by the node is shorter than that held by the traveler. \(\sigma\) denotes the probability of perceiving an existing better route in a given day, and captures the differentiation in the effectiveness of social networks defines the shape of the probability curve.
- https://eng.libretexts.org/Bookshelves/Civil_Engineering/Fundamentals_of_Transportation/02%3A_Planning_Models
- https://eng.libretexts.org/Bookshelves/Civil_Engineering/Fundamentals_of_Transportation/02%3A_Planning_Models/2.04%3A_ModesWikipedia’s article gives a list of a variety of modes largely defined by their technology (are they powered by animals or engines, are the engines on the vehicle or is the vehicle powered by a cable,...Wikipedia’s article gives a list of a variety of modes largely defined by their technology (are they powered by animals or engines, are the engines on the vehicle or is the vehicle powered by a cable, do the vehicles travel on land, sea, or water, etc. gondolas and subways are much the same from a transportation service perspective but for one is underground and uses a train and the other is suspended by a cable which moves it).
- https://eng.libretexts.org/Bookshelves/Civil_Engineering/Fundamentals_of_Transportation/03%3A_Modeling_Methods/3.03%3A_Land_Use_ForecastingEven though there isn’t much use of full blown land use modeling in the US today, we need to understand the subject: the concepts and analytic tools pretty much define how land use-transportation matt...Even though there isn’t much use of full blown land use modeling in the US today, we need to understand the subject: the concepts and analytic tools pretty much define how land use-transportation matters are thought about and handled; there is a good bit of interest in the research community where there have been important developments; and when the next upturn in infrastructure development comes along the present models will form the starting place for work.
- https://eng.libretexts.org/Bookshelves/Civil_Engineering/Fundamentals_of_Transportation/02%3A_Planning_Models/2.01%3A_ModelingThe world view is your internal model of how the world works; it is employed every time you make a prediction: what do you expect, what is a surprise. If you are modeling for personal pleasure, it wil...The world view is your internal model of how the world works; it is employed every time you make a prediction: what do you expect, what is a surprise. If you are modeling for personal pleasure, it will naturally reflect your own worldview, but if you are working for an employer or client, their point of view must also be considered, if the inputs or results deviate significantly from their worldview, they may adapt their worldview, but more likely will dismiss the model.
