In summary, the assignment model software available offers a wide range of features and has a diverse range of data requirements and model outputs. To assist in the selection of a suitable software package, the following tables summarise the outputs and functionality of the model types.
Typical model outputs for each category of model are shown in Table 17.4.|
Model Types |
Flows, Journey Times, Queue Lengths etc. |
Classified Outputs |
Routing Paths/ Costs |
OD Based Outputs |
Link Based Outputs |
Pollution Emissions |
Pedestrian Visualisation |
|
Road Traffic Assignment |
*** |
** |
*** |
** |
*** |
* |
- |
|
Public Transport Passenger Assignment |
** |
** |
*** |
** |
*** |
- |
- |
|
Traffic Microsimulation |
*** |
*** |
*** |
*** |
*** |
*** |
* |
|
Junction Model |
*** |
- |
- |
* |
* |
* |
- |
|
Pedestrian Model |
** |
* |
** |
** |
- |
- |
*** |
|
Key: |
*** Full Range of Output |
** Selected Outputs |
* Little Output |
- No Output |
|||
Typical assignment methods available with each model type are shown in Table 17.5.
Table 17.5: Assignment Methods
|
Model Types |
Dynamic |
Equilibrium |
Stochastic |
All or Nothing |
|
Road Traffic Assignment |
No |
Yes |
Yes |
Yes |
|
Road Traffic Assignment |
No |
No |
Yes |
Yes |
|
Public Transport Passenger Assignment |
No |
Yes |
N/A |
Yes |
|
Traffic Microsimulation |
Yes |
Not Standard |
Yes |
Yes |
|
Junction Models |
No |
No |
No |
No |
|
Pedestrian Models |
Yes |
No |
Yes |
Yes |
The extent to which public transport is represented in each model type is summarised in Table 17.6.
Table 17.6: Public Transport Capability
|
Model Types |
PT Modes / Routes |
Bus / LRT Priority |
Passenger Loading / Vehicle Occupancy |
Impact of Dwell Times, Vehicles Manoeuvres |
Response to Overcrowding |
|
Road Traffic Assignment |
Yes |
Yes |
No |
No |
No |
|
Public Transport Passenger Assignment |
No |
Yes |
Yes |
No |
Yes |
|
Traffic Microsimulation |
Yes |
Yes |
Yes |
Yes |
No |
|
Junction Models |
No |
No |
No |
No |
No |
|
Pedestrian Models* |
Yes |
No |
Yes |
Yes |
No |
*Note: Detail and application of PT information likely to be station / terminal specific for pedestrian modelling
