VISSIM 5.30-05 User Manual

Assignment Control
either up or down to the given percentage. Values > 100% permitted
(e.g. for future demand scenarios).
● Correction of overlapping paths: Corrects the proportions of vehicles
being assigned if routes share common edges
● Avoid Long Detours: Paths with long detours (segments that could be
replaced by shorter distance alternatives from different paths) will not be
used for vehicle distribution. The factor for deciding when a segment is a
detour can be defined in the adjacent field.
● Use VISSIM’s Virtual Memory allows the user to conserve some of the
memory (RAM) used while running a simulation with Dynamic
Assignment. If checked, a file is created that holds a reference to the
vehicles that will eventually enter the network instead of those vehicles
being generated at the beginning of the simulation and being stored in
the computers memory until they leave the network. Using the Virtual
Memory option slows down the simulation but will not tie up as much of
the systems memory resources.
● CONVERGENCE: Provides three threshold values to detect convergence of
the Dynamic Assignment process.
● ROUTE GUIDANCE: Allows for definition of up to two control strategies to be
used by vehicles with route guidance (e.g. navigation system).
● CREATE STATIC ROUTING: Starts the conversion of the current Dynamic
Assignment results into static routes, cf. section 12.8.5.
User Manual © PTV AG 2011 647