Appendix E – ICM Data Needs
Data needs will vary based on the infrastructure within the corridor, the participating agencies, and the types of analysis, modeling, and decision support tools that are implemented. There is no strong consensus at this time about what data is actually needed from arterial systems for ICM implementation. The consensus is equally poor about what performance measures for arterial systems are critical for corridor management.
This is a new operational territory and it may well turn out that the data and performance measures for corridor operations are different from the traditional data and measures used for operation of arterial traffic signal systems.
Table 3 shows a comparison of data typically collected for modeling arterial systems, and the data that may be required for analysis, modeling, and decision support in corridor management systems.
Table 3 – Analysis, Modeling, and Decision Support Data Needs
| Not Applicable | Beginning Typical |
Beginning ICM |
End Typical |
End ICM |
Intersection Typical |
Intersection ICM |
Mid Block Typical |
Mid Block ICM |
Source Typical |
Source ICM |
Sink Typical |
Sink ICM |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Volume |
M |
M |
M |
M |
M |
M |
E |
E |
M |
M |
M |
M |
Density |
C |
C |
C |
C |
C |
C |
C |
C |
C |
C |
C |
C |
Speed |
C |
C |
C |
C |
C |
C |
C |
C |
C |
C |
C |
C |
Classification |
D |
D |
D |
D |
D |
D |
D |
D |
D |
D |
D |
D |
Heading |
E |
E |
E |
E |
E |
E |
E |
E |
E |
E |
E |
E |
Queue Length |
C |
C |
C |
C |
C |
C |
C |
C |
D |
D |
D |
D |
O-D |
E |
E |
E |
E |
E |
E |
E |
E |
E |
E |
E |
E |
Turns |
N |
N |
N |
N |
M |
M |
N |
N |
M |
M |
M |
M |
Block Cap |
C |
C |
C |
C |
C |
C |
C |
C |
C |
C |
C |
C |
Trip O-D |
N |
N |
N |
N |
N |
N |
N |
D/E |
N |
N |
N |
N |
Tolling/Pricing |
M |
M |
M |
M |
M |
M |
M |
M |
M |
M |
M |
M |
HC |
E |
E |
E |
E |
E |
E |
E |
E |
E |
E |
E |
E |
Nox |
E |
E |
E |
E |
E |
E |
E |
E |
E |
E |
E |
E |
PM |
E |
E |
E |
E |
E |
E |
E |
E |
E |
E |
E |
E |
O3 |
E |
E |
E |
E |
E |
E |
E |
E |
E |
E |
E |
E |
Transit Route |
M/C/E |
M/C/E |
M/C/E |
M/C/E |
M/C/E |
M/C/E |
M/C/E |
M/C/E |
M/C/E |
M/C/E |
M/C/E |
M/C/E |
Transit Schedule |
M/C/E |
M/C/E |
M/C/E |
M/C/E |
M/C/E |
M/C/E |
M/C/E |
M/C/E |
M/C/E |
M/C/E |
M/C/E |
M/C/E |
Priority |
M/C/E |
M/C/E |
M/C/E |
M/C/E |
M/C/E |
M/C/E |
M/C/E |
M/C/E |
M/C/E |
M/C/E |
M/C/E |
M/C/E |
Transit Occupancy |
M |
M |
M |
M |
M |
M |
M |
M |
M |
M |
M |
M |
