VISSIM 5.30-05 User Manual

12 Dynamic Assignment
ALTERNATIVE
PATH
SEARCH...
In the Paths window, all known
routes are listed with their
general Cost value and length
(Distance) for the selected OD
pair. Furthermore it displays
the number of vehicles
(Volume) that have used a
path in the last simulation run
when a path file (*.WEG) was
written.
Since costs are type specific
and time dependent, a vehicle
type and an evaluation interval
need to be selected. If a route
is selected in the list box, it is
highlighted in the network
display as a yellow band.
The corresponding buttons select which set is listed.
► For automatic detour detection, the list of paths is separated in sets of
- “normal” Paths and
- Detours.
► If convergence parameters are set, all paths that have not met the
convergence criteria can be displayed via option
- Show Non Converging Paths.
Closed paths (because of edge and connector closures) are listed as well in
the Path selection window:
► The closed edges respectively edges containing closed links are
highlighted in red when the path is displayed.
► The path's parameters (length, cost, volume) are shown in brackets.
The path volume is always shown as the sum of all vehicle types. Thus
selecting a different vehicle type will not change this value. Furthermore
there might still be vehicles listed for paths where a connector is closed for
a certain (and not all) vehicle class only.
If Penalization of the shortest path
is checked, VISSIM will continue
after the normal shortest path
search; further searches with
changed edge evaluations will be
run, until either a new path
without route closures is found or
the maximum number of passes
is reached.
628 VISSIM 5.30-05 © PTV AG 2011