6. I-394 ICMS Interface Requirements
The ICMS shall exchange data among subsystems of the ICMS, and with other systems by following protocols and data structures of established Interface Control Documents (ICDs). Whenever possible, the ICDs will make use of and adhere to National ITS Standards, however the ICD will typically include additional information beyond what is contained in the National standards. For example, the ICD will identify the specific phrases, terms, or data sets to be used from the standard, and describe details of how data communications are originated, performed, verified, and terminated.
The ICDs described in this section will be developed during the design process and completed and approved by the ICM Project Team prior to the onset of software coding.
Summary of Interface Requirements for the I-394 ICMS
ICMS-EMS to ICMS-Data Hub ICD
The ICMS-EMS to ICMS-Data Hub ICD shall describe the protocols and data structures to be used to exchange messages and data sets from any emergency management service (EMS) Computer Aided Dispatch (CAD) systems to the ICMS-Data Hub. The ICMS-EMS to ICMS-Data Hub ICD shall be used for the following exchanges:
- Minnesota State Patrol CAD (ICMS-MSP-EMS) to the ICMS-Data Hub
- The Hennepin County CAD (ICMS-HENN-EMS) to the ICMS-Data Hub
- The City of Minneapolis CAD (ICMS-COM-EMS) to the ICMS-Data Hub.
In addition, in the future, should any additional city or county EMS centers join the ICM project (either by geographic expansion or increased coverage in the corridor), the additional agencies will use this same ICD for data exchanges.
ICMS-Traffic Operations to ICMS-Data Hub ICD
The ICMS-Traffic Operations to ICMS-Data Hub ICD shall describe the protocols and data structures to be used to exchange messages and data sets from the Mn/DOT Traffic Operations Center to the ICMS-Data Hub. The messages from the Mn/DOT Traffic Operations Center may originate from the Mn/DOT IRIS Traffic Management Center software, or the Mn/DOT Condition Reporting System. Regardless of the source sending the messages, the ICMS-Traffic Operations to ICMS-Data Hub ICD shall be used.
ICMS-ASG to ICMS-Data Hub ICD
The ICMS-ASG to ICMS-Data Hub ICD shall describe the protocols and data structures to be used to exchange messages and data sets from any Arterial Signal Group System (ASG) to the ICMS-Data Hub. The ICMS-ASG to ICMS-Data Hub ICD shall be used for the following exchanges:
- Mn/DOT ASG (ICMS-Mn/DOT-ASG) to the ICMS-Data Hub
- The Hennepin County ASG (ICMS-HENN-ASG) to the ICMS-Data Hub
- The City of Minneapolis ASG (ICMS-COM-ASG) to the ICMS-Data Hub.
In addition, in the future, should any additional city or county arterial signal operations division join the ICM project (either by geographic expansion or increased coverage in the corridor), the additional agencies will use this same ICD for data exchanges.
ICMS-MTCC to ICMS-Data Hub ICD
The ICMS-MTCC to ICMS-Data Hub ICD shall describe the protocols and data structures to be used to exchange messages and data sets from the Metro Transit Control Center ICMS Enhancement (ICMS-MTCC) to the ICMS-Data Hub.
ICMS-ABC System to ICMS-Data Hub ICD
The ICMS-ABC to ICMS-Data Hub ICD shall describe the protocols and data structures to be used to exchange messages and data sets from the ICMS Enhancements to the ABC Garage System (ICMS-ABC) to the ICMS-Data Hub.
ICMS-Data Hub Post ICD
The ICMS-Data Hub Post ICD shall describe the protocols and data structures to be used by the ICMS-Data Hub in posting messages and data sets on an Internet accessible location to be acquired by other ICMS Systems. The ICMS-Data Hub posting of messages and data will all be public information; therefore, this ICD can be used by any ICMS System, or any other system, to acquire the public information data posted by the ICMS-Data Hub.
In addition, the MTCC Park-and-Ride lots will post data and messages describing parking availability to be acquired by the ICMS-MTCC. This internal MTCC data transfer will also follow the ICMS-Data Hub Post ICD.
ICMS-MTCC Sign Control ICD
The ICMS-MTCC Sign Control ICD shall describe the protocols and data structures to be used by the ICMS-MTCC System to send text to the ICMS-MTCC DMS signs located at Park-and-Ride facilities. This ICD shall be based on the NTCIP DMS control protocol, however will have additional details about specific interfaces.