Smart Display configuration

See also: → General information on datasources

The relevant import data sources are:

Parameter Type Description
DS_MAIN   This is the main data source. It contains the most important information of the network, such as the street map and the events. Typically the main data source is a Visum database or a Visum .net file.

The DS_MAIN are to be indicated as follows:

postgresql:Server=localhost;Port=5432;Uid=user;Pwd=password;
Database=mydb;CommandTimeout=3600
DS_OPTN   This data source contains general information of the network, such as the coordinates topology of the points of the links of the list (geographic or projected).
DS_LKST   This is the data source of the LKST table. It contains the relationship between the street map and the assignment graph (→ Smart Display methodology > Splitting rate computation).
DS_EVNT   This is the data source of the events of the network.
DS_VMSP   This is the data source of the variable message signs of the network.
SATT   This is not a key of a data source but a key for importing the attributes of the streets. The attributes of SATT have already been set to SPED (speeds) and CAPA (capacity). We recommended leaving these settings unchanged.

The following table shows the correspondences between the attributes in the Optima database and the variables of the mode (→ Smart Display methodology).

Variable Table Attribute Type Description
id STRT idno Integer Key code
tail STRT tail Integer Tail node
head STRT head Integer Head node
La STRT leng Double Length of the link a
Va STRT sped Double Maximum speed of the link a
Ca STRT capa Double Capacity of the link a
fa RLIN_TSYS_TRE_EQUA flow Double Flow of the link a

The following table shows the correspondences between the attributes in the Optima database and the variables of the model (→ Smart Display methodology).

The variables rve and rce are computed using two attributes:

  • ANAM, which contains the affected attribute (SPED for rve, CAPA or GREN for rce)
  • AVAL, which contains the value of the variables (absolute speed for SPED, absolute capacity for CAPA or capacity share for GREN).

SPED and CAPA or GREN contain the overriding values. To obtain, for example, rce, compute 1 − CAPA / Ca or compute 1 − GREN.

Variable Table Attribute Type Description
e EVNT idno Integer Event ID
iee EVNT prio Double Event importance
rve EIMP aval Double Speed reduction
rce EIMP aval Double Capacity reduction
tie EVNT ldat Date Starting instant of the event
tfe EVNT fdat Date Ending instant of the event
A(e) ESTR strt, fsnd Integer Set of links where the event is located

The following table shows the correspondences between the attributes in the Optima database and the variables of the model (→ Smart Display methodology).

The variables are located in a command line file, where each variable has its input value below its name.

The main variables are:

Variable Attribute Type Description
BKMG BKMG Integer This is the background variable of the process.
  • 0 = show all the function calls and the iterations in a console
  • 1 = show only the iterations
  • 2 = work in the background

Possible values: {0,1, 2}
NPTH NPTH Integer Number of parallel threads for the assignment static procedure.
ESST ESST Integer Updating period of the event.

The unit is seconds.
SplitModelCoef SplitModelCoef Double Coefficient to set the type of assignment to execute for the production of link flow for destination.
  • 0 = deterministic
  • 1 = logit

Possible values: {0,1}
FlowDestinations FlowDestinations Integer Coefficient to set how link flows are computed.
  • 0 = compute the link flows for the destination relating to the zones
  • 1= compute the link flows for the zone groups of the model

Possible values: {0,1}

βie

b_ie Double Coefficient that multiplies iee to obtain pie in a linear combination.
βde b_de Double Coefficient that multiplies dee to obtain pie in a linear combination,
βpe b_pe Double Coefficient that multiplies pee to obtain pie in a linear combination,
T1 T1 Double Maximum delay in seconds.

αtr

alpha_tr Double Reduction coefficient of the relative priority for the travel time.

Possible values: (0, 1)
TTH time_threshold Double Time span in seconds beyond which the events are no longer relevant and their priority is set to 0.
PTH prob_threshold Double Threshold of the flow percentage for the destination below which the search of events is stopped.
TR TR Double Maximum temporal distance of the event.
defcapa DF_CAPA Double Default capacity (veh/h).
defsped DF_SPED Double Default speed (km/h).
βvms beta_vms Double Reduction coefficient of relative priority traveling a link on which there is a variable message sign.

Possible values: (0, 1)
ShortestPathTSys ShortestPathTSys String Code of the transport system that has to be used by the shortest paths.
WebServiceAddress WebServiceAddress String Address of the web service.