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2. Fundamental diagram of traffic flow - Wikipedia

   en.wikipedia.org/wiki/Fundamental_diagram_of...

   The flow and capacity at which this point occurs is the optimum flow and optimum density, respectively. The flow density diagram is used to give the traffic condition of a roadway. With the traffic conditions, time-space diagrams can be created to give travel time, delay, and queue lengths of a road segment.

3. Flow map - Wikipedia

   en.wikipedia.org/wiki/Flow_map

   1838 map of pre-railroad cargo traffic in Ireland, one of the first thematic maps to use proportional symbols. The earliest known map to visually represent the volume of flow were two maps by engineer Henry Drury Harness, published in 1838 as part of a report on the potential for railroad construction in Ireland, showing the quantity of cargo traffic by road and canal.

4. Traffic flow - Wikipedia

   en.wikipedia.org/wiki/Traffic_flow

   In transportation engineering, traffic flow is the study of interactions between travellers (including pedestrians, cyclists, drivers, and their vehicles) and infrastructure (including highways, signage, and traffic control devices), with the aim of understanding and developing an optimal transport network with efficient movement of traffic and minimal traffic congestion problems.

5. Three-phase traffic theory - Wikipedia

   en.wikipedia.org/wiki/Three-phase_traffic_theory

   The hypothesis of Kerner’s three-phase traffic theory about the 2D region of steady states of synchronized flow is contrary to the hypothesis of earlier traffic flow theories involving the fundamental diagram of traffic flow, which supposes a one-dimensional relationship between vehicle density and flow rate.

6. ISO 10628 - Wikipedia

   en.wikipedia.org/wiki/ISO_10628

   ISO 10628 Diagrams for the chemical and petrochemical industry specifies the classification, content, and representation of flow diagrams. It does not apply to electrical engineering diagrams. ISO 10628 consists of the following parts: Part 1: Specification of Diagrams (ISO 10628-1:2014) [1] Part 2: Graphical Symbols (ISO 10628-2:2012)

7. Newell's car-following model - Wikipedia

   en.wikipedia.org/wiki/Newell's_car-following_model

   Assuming the fundamental diagram (flow-density) is a triangular function, a traffic state A with speed v A and density k A can be assumed in the congestion region. The density on the roadway can be determined using the spacing between vehicles and is computed simply the equation: k A = 1/s A

8. File:Speed-flow horseshoe diagram traffic congestion.svg

   en.wikipedia.org/wiki/File:Speed-flow_horseshoe...

   English: Speed-flow diagram or speed-volume diagram: vehicle speed versus vehicles per hour passing through a point on a highway. The horseshoe shape indicates that vehicle throughput collapses when volume is 80%-100% of capacity. The traffic mode changes from free-flowing in the green area, to congested in the gray area.

9. Three-detector problem and Newell's method - Wikipedia

   en.wikipedia.org/wiki/Three-detector_problem_and...

   In this special case, we use the Triangular Fundamental Diagram (TFD) with three parameters: free flow speed , wave velocity -w and maximum density (see Figure 1). Additionally, we will consider a long study period where traffic past upstream detector (U) is unrestricted and traffic past downstream detector (D) is restricted so that waves from ...