WR =
<RoWPar>
;
- the pathway in the case it should be a rail
WE =
<RoWPar>
;
- the pathway in the case it should be a rail and a catenary
WA =
<RoWPar>
;
- the pathway in the case it should be a street
WT =
<RoWPar>
;
- the pathway in the case it should be a tram path = street and catenary
WM =
<RoWPar>
;
- the pathway in the case it should be third rail
<RoWPar> == <RoWPar>
|| <RoWPar> | <RoWPar>
<RoWParElem> == <Row>
|| <ParamsToAdd>
The parameters - which will be inherited in the segmentation hierarchy - can change the pathway Traffic shows. The value of this parameter can be the “traditional” <Row>
element - the one or two character abbreviation of the pathway - , or it can be a set of additional parameters ( usually [BG= ]
and [FG= ]
elements ), which will be added to their corresponding parameters in the case the train needs that type of pathway they define.
The selection of the pathway has the following steps:
Wx= ;
parameter's value (either specified at the command, or inherited in the segmentation hierarchy) is consulted.
As the segmentation hierarchy inherits the values from the global $Wx
commands or from the $WAY
command, and this commands have also overall defaults, when everything in this chain is missing, Traffic shows logical pathways from the built-in set - see the set described at the <RoW>
syntactical element.
If an explicit value is given on the way described above, then
<ParamsToAdd>
syntax elemnt), in that case the parameters remaining on the end of the selections will be added - the pathway will be generated usually by [BG= ]
and [FG= ]
parameters, using explicit pictures.