ClearGuide

ClearGuide is a mobility intelligence system that provides real-time route and workzone delay, travel time and other data.

To use the system, one comm link must be configured using the clearguide protocol. The URI specifies the HTTPS address of a ClearGuide server. There must be a single controller associated with the comm link, and its password field must contain both the user name and password in the form username:password. The clearguide_key system attribute should also contain the ClearGuide agency name.

ClearGuide Action Tag

Real-time ClearGuide data can be embedded in DMS messages using device actions. A [cg … ] action tag in the message pattern will be replaced by the appropriate value. The action tag has the following format:

[cg dms,wid,range,mode,idx ]

Parameters

1. dms: Name of DMS associated with the workzone defined in ClearGuide
2. wid: The workzone ID defined in ClearGuide
3. range: Numeric range for the mode's statistic, one of:
   • min-max: Range of acceptable values (inclusive)
   • min: Minimum accepable value
4. mode: Tag replacement mode for ClearGuide statistics:
   • tt: workzone travel time (minutes), calculated as max(tta, ttsl)
   • ttsl: workzone travel time (minutes) at the speed limit
   • tta: actual travel time (minutes), may be > ttsl
   • delay: workzone delay (minutes)
   • sp: workzone speed (mph)
   • sp_cond: Condition dependent on workzone speed (mph)
5. idx: The zero-based index of the workzone associated with the DMS. This only applies for DMS with more than 1 associated workzone. It is optional and defaults to zero.