CORSIM RTE
Run-Time
Extension
TSIS is an integrated
development environment that enables users to conduct traffic
operations analysis. Built using a component architecture, TSIS
is a toolbox that contains tools that allow the user to define and
manage traffic analysis projects, define traffic networks and create
inputs for traffic simulation analysis, execute traffic simulation
models, and interpret the results of those models. Although it
comes pre-configured with a set of tools, TSIS provides a
mechanism by which an external application can interface directly with
CORSIM simulation. This type of application has become known as a
CORSIM run-time extension (RTE). Run-time extensions can
be built to replace existing logic in CORSIM, or to supplement the
logic. The original run-time extensions were tailored
for signal timing studies. However, the concept has been expanded
to support freeway monitoring, incident detection and ramp metering
run-time extension packages.
The RTE capability
enables CORSIM to operate with actual hardware in the loop. Some
examples of these hardware-in-the-loop experiments include using 170,
NEMA, and 2070 controllers to control the signal states at certain
intersections in the simulation. The controller is interfaced to
the simulation using the Controller Interface Device (CID) developed by
Louisiana State University under the direction of FHWA. Another
experiment involved using an advanced camera sensor and image
processing software to estimate the queue state of simulated vehicles
as they approach an intersection. The queue states for the
approaches to the intersection are used by an adaptive control
algorithm to make intelligent decisions about what the optimal signal
state should be. Run-time extensions can also be used to test
adaptive signal control algorithms for effectiveness before they are
implemented in the field. With the rapid evolution of technology,
these types of experiments are necessary, not only to assess the
benefits of advanced ITS applications, but to verify their operational
capability before field deployment.
In TSIS 6.0, the RTE can
now access CORSIM at
additional 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.
CORSIM RTE
Run-Time
Extension
TSIS is an integrated
development environment that enables users to conduct traffic
operations analysis. Built using a component architecture, TSIS
is a toolbox that contains tools that allow the user to define and
manage traffic analysis projects, define traffic networks and create
inputs for traffic simulation analysis, execute traffic simulation
models, and interpret the results of those models. Although it
comes pre-configured with a set of tools, TSIS provides a
mechanism by which an external application can interface directly with
CORSIM simulation. This type of application has become known as a
CORSIM run-time extension (RTE). Run-time extensions can
be built to replace existing logic in CORSIM, or to supplement the
logic. The original run-time extensions were tailored
for signal timing studies. However, the concept has been expanded
to support freeway monitoring, incident detection and ramp metering
run-time extension packages.
The RTE capability
enables CORSIM to operate with actual hardware in the loop. Some
examples of these hardware-in-the-loop experiments include using 170,
NEMA, and 2070 controllers to control the signal states at certain
intersections in the simulation. The controller is interfaced to
the simulation using the Controller Interface Device (CID) developed by
Louisiana State University under the direction of FHWA. Another
experiment involved using an advanced camera sensor and image
processing software to estimate the queue state of simulated vehicles
as they approach an intersection. The queue states for the
approaches to the intersection are used by an adaptive control
algorithm to make intelligent decisions about what the optimal signal
state should be. Run-time extensions can also be used to test
adaptive signal control algorithms for effectiveness before they are
implemented in the field. With the rapid evolution of technology,
these types of experiments are necessary, not only to assess the
benefits of advanced ITS applications, but to verify their operational
capability before field deployment.
In TSIS 6.0, the RTE can now access CORSIM at additional 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.