Sustainable Urban Freight | Modelling city logistics Prof. Lorant - - PowerPoint PPT Presentation

Sustainable Urban Freight | Modelling city logistics

• Prof. Lorant Tavasszy

Co Content

• 1. Why model city logistics?
• 2. What are typical modelling problems?
• 3. What are the main techniques used?

Further reading:

Mo Modellin lling freig ight flo lows in in the cit ity

Why?

• Make movements inside city

visible for all

• Provide numbers for a sense
• f proportion
• Design strategies & policies
• Predict effects of changes

Ty Typical mo mode delling ng pr probl blems ms

Consumer:

• What to buy where, when?

Receiver:

• How much to order?

Shipper:

• Own account or professional

carrier? Carrier:

• Which route to follow?
• Use city warehouse?
• Electric or diesel truck?

Shipper Receivers Urban Consolidation Center Electric truck 2018 2020 Carrier

Ci City-wide modelling (“commodity ty based”)

P/C table Production Consumption Origin/ Destination tables by mode

Traffic Assignment Model Mode Choice Model Spatial Distribution Model (e.g. gravity model) Freight Generation Model

Warning: empty trips!

Si Simplified c city-wide modelling (“tri trip based”)

O/D table (road) Trip production Trip attraction

Traffic Assignment Model

Validate Against Traffic Observations

Spatial Distribution Model (e.g. gravity model) Trip Generation Model

De Decisi sion Su Support System (h

(here: Ur Urban an Strategy) )

Source: TNO

Ad Advan anced models

• 1. Accurate logistics (e.g. tours, shipment

sizes, inventories)

• 2. Simulating dynamics of daily movements
• 3. Modelling stakeholders

(Agent Based Models)

Shipper Receiver Warehouse

Source: TNO, TU Delft

Su Summar ary

A brief introduction into freight modelling at city level

• Typical modelling problems
• Main modelling approaches
• Directions for research