Public Transport and Railways

ETHZ / Bauingenieur Bsc. / 5.Semester / HS2020 / Public Transport and Railways

ETHZ / Bauingenieur Bsc. / 5.Semester / HS2020 / Public Transport and Railways


Set of flashcards Details

Flashcards 94
Students 48
Language Deutsch
Category Traffic
Level University
Created / Updated 02.10.2020 / 28.01.2025
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Operations of Multiple Tracks

Traction-Force-Diagram

Main Content

  • Max force against speed
  • Max power
  • Max speed

Implication

  • Possible speeds
  • Possible acceleration
  • Possible load

High Speed Train

  • Speed > 200 km/h
  • exploitable almost only on dedicated infrastructure
  • high strength tracks or ballast-free tracks
  • high precision alignment
  • limited curvature radii and limited slopes
  • high electric power required
  • average speed is highly dependend on amount of stops

Bus - Advantages and Disadvantages

Advantages:

  • Flexibility of infrastructure usage
  • Less and faster infrastructure setup
  • Greater friction --> better adhesion --> higher de-/acceleration
  • good service in rural areas with frequent stops

Disadvantages

  • Mixed traffic; congestion effects; pedestrian crossing and traffic lights
  • Adhesion forces (rolling friction); quality of road
  • Limited length/capacity

Metro - Advantages

+ Seperated infrastructure

+ Very high capacity

+ Large doors, level acces --> short dwell times

Why is Public Transport Supplied with Lines?

Public = Usable by All

    --> Requires a Driver

         --> High fixed costs

             --> Bundle Demand

                 --> Organise in Lines

Qualities Affecting Public Transport Demand

Network Dilemmas

Node Density

Network Density

Line Density

Frequency

Number of Services

Connection Structure

Network Dilemma - Node Density

Network Dilemma - Network Density

Network Dilemma - Line Density

Network Dilemma - Frequency

Network Dilemma - Number of Services

Network Dilemma - Connection Structure