Version 6.0 now offers improved simulation logic for surface street lane changing, complex intersection modeling, freeway acceleration lanes, deceleration lanes, ramp meters, car-following, and origin-destination modeling. An enhanced random number generator will produce better distributions, for improved stochastic modeling.
Graphical Input Editor (TRAFED)
- Automatically merge two separate networks into one.
- Snap to grid so nodes can be placed at even increments.
- Change the background color.
- Cut, copy, or paste multiple links and nodes at once.
- Move selected links and nodes using the arrow keys.
- Scroll beyond the edge of the network.
Actuated controller parameters may now vary from time period to time period to simulate different time-of-day plans. The number of actuated controllers is now dynamic and limited only by the number of nodes in the network. The TRAFED input screens for actuated control have been radically changed to make it easier to specify actuated controllers in CORSIM.
The Output Processor has been redesigned to efficiently summarize any model result generated by CORSIM. Obtain cumulative MOEs from the start of simulation, or just for the current time interval, or just for the current time period, or any combination of those three.
Vehicle Animation File
The TRAFVU animation module can now process animation files larger than 2 gigabytes. If desired, the user can now ignore any desired set of links during animation, which reduces animation file size.
- CORSIM can now simulate up to eleven through lanes in one direction on a mainline freeway link, i.e., 5 through lanes plus 6 full auxiliary lanes.
- The minimum desired free-flow speed on surface streets has been reduced to one mile per hour, to approximate vehicles dwelling in locations such as airport passenger pickup zones.
- Truck lane logic was modified to provide exclusive truck lanes in which non-truck vehicles are prohibited.
- Sign control can now be active in one time period and removed in the next time period, or vice versa.
- The user can now observe vehicles entering the network during the initialization period, if desired.
Measure of Effectiveness (MOE) Data in TRAFVU
TRAFVU now reports interval-specific data in addition to cumulative data. Time interval-specific data is more reflective of conditions at the time shown. TRAFVU and CORSIM now report exactly the same MOE values.
Run time extensions (RTEs) may now access CORSIM at more than one different processing control points, providing more control to an RTE and allowing a wider variety of extensions to CORSIM. New actuated control API functions enable RTE developers to access critical control parameters and obtain diagnostic state information regarding actuated control.
The TRF Manipulator tool can be used in a script to repeatedly open a CORSIM (*.TRF) input file, manipulate the contents, and save the file with a new name. Well-written scripts can make this tool do much of the previously intensive and error prone task of changing data for experimental research.