Podcast
Questions and Answers
What do nodes in a transportation network often represent?
What do nodes in a transportation network often represent?
- Links between locations
- Terminals or stations (correct)
- Roadside rest areas
- Traffic signals
Which of the following is typically considered a link in a transportation network?
Which of the following is typically considered a link in a transportation network?
- A highway (correct)
- A train station
- A parking lot
- An airport terminal
What does the term 'capacity' refer to in the context of transportation links?
What does the term 'capacity' refer to in the context of transportation links?
- The physical length of the link
- The maximum flow rate the link can handle (correct)
- The speed limit on the link
- The number of lanes on the link
In transportation networks, what does it mean for a network to be 'redundant'?
In transportation networks, what does it mean for a network to be 'redundant'?
Which of the following is an example of a node?
Which of the following is an example of a node?
Which of the following is a type of street in a hierarchical network?
Which of the following is a type of street in a hierarchical network?
What is a typical characteristic of transportation networks?
What is a typical characteristic of transportation networks?
What is a guideway considered as?
What is a guideway considered as?
What is assigned to the shortest path between origin and destination in traffic assignment?
What is assigned to the shortest path between origin and destination in traffic assignment?
Which of the following is considered a type of traffic assignment?
Which of the following is considered a type of traffic assignment?
Links take flows typically of vehicles, in how many directions?
Links take flows typically of vehicles, in how many directions?
Nodes often represent all of the options below, except:
Nodes often represent all of the options below, except:
In relation to capacity, what happens when a link volume goes beyond capacity?
In relation to capacity, what happens when a link volume goes beyond capacity?
Capacity is a(n) _______ volume.
Capacity is a(n) _______ volume.
Which of the following best describes an intermodal network?
Which of the following best describes an intermodal network?
Flashcards
What are Nodes?
What are Nodes?
Basic network elements representing terminals or stations in transportation networks.
What are Links?
What are Links?
Guideways, highways, rail lines, or air corridors that facilitate movement in transportation networks.
What is Capacity?
What is Capacity?
The maximum flow rate a link can handle before travel time becomes infinite.
What are Intermodal Networks?
What are Intermodal Networks?
Signup and view all the flashcards
What is Traffic Assignment?
What is Traffic Assignment?
Signup and view all the flashcards
Study Notes
- Transportation systems use networks that are interconnected
- Links connect through nodes that are basic network elements representing terminals or stations
- Transportation networks in most cases are redundant, providing multiple travel routes between nodes
Links
- Links are transportation guideways, highways, rail lines, and air corridors
- Links facilitate the flow of vehicles in one or both directions
- Links have the capacity to allow a certain number of vehicles per hour
Capacity
- Capacity is defined as the link volume beyond which the travel time is infinite
Hierarchical Networks
- Common categories:
- Highways
- Local streets
- Collector streets
- Arterial streets
- Expressways
Intermodal Networks
- Intermodal networks can include transit, roads, stations with transit links, park and ride and air corridors
Nodes
- Nodes represent:
- A terminal yard in a railroad operation
- An airport
- A parking lot
- Nodes have a capacity limit
Node to Denote Link Change
- A node indicates that the number of lanes on a section of road has changed
Origin-Destination Matrix
- A matrix used to show the flow between different locations
Traffic Assignment
- Involves assigning traffic to the shortest path between an origin and destination
- All or nothing assignment
- Incremental assignment
Other ideas
- The reverse problem looks at estimating origin-destination flows using measured link flows
- "Logical" links refer to using a link as a logical connection, such as a freight car making a train connection
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
