1.2.4 - Output Control Data DFD
This DFD shows the processes that make up the Output Control Data facility within the Manage Traffic function.The key points about the facility are as follows:
- Non-compliance with control commands by indicators reported as faults;
- Data for in-vehicle signage output and dynamic message signs to roadside equipment automatically;
- Data for managing and controlling barrier systems automatically;
- Data for managing and controlling electrical lighting systems automatically.
There are seven processes in this DFD:
a) Output Control Data for Roads (1.2.4.1)
b) Output Control Data for Freeways (1.2.4.2)
c) Output In-vehicle Signage Data (1.2.4.3)
d) Output Roadway Information Data (1.2.4.4)
e) Manage Barrier Systems (1.2.4.5)
f) Manage Lighting System (1.2.4.6)
g)Manage Roadway Warning System (1.2.4.7)
These processes can be implemented separately, or grouped by processes supporting freeways and those supporting roads. In the latter case there will be a broadcast output process in each of the pairs, with only one input flow. It would also be possible to implement all processes as one group for a mixed freeway and road management system.
DFD: 1.2.4 - Output Control Data
Parent DFD: 1.2 - Provide Device Control
PSpecs in this DFD:
- 1.2.4.1 - Output Control Data for Roads
- 1.2.4.2 - Output Control Data for Freeways
- 1.2.4.3 - Output In-vehicle Signage Data
- 1.2.4.4 - Output Roadway Information Data
- 1.2.4.5 - Manage Barrier Systems
- 1.2.4.6 - Manage Lighting System
- 1.2.4.7 - Manage Roadway Warning System
