Yard Solutions

Blue Flag Indicator (BFI)

Wireless remote control of blue flags boosts productivity.

Blue Flag Indicator System

At A Glance

  • Utilize wireless communications for remote control of blue flags. Save time driving to each end of train to manually apply/remove blue flags
  • Flexible control options include central PC or control panel in yard
  • Log the name and trade of each craft controlling the flag along with date and time. Information can be used in FRA reporting and eliminate the need for a manual logging process
  • LED light indicators are visible in daylight or night time conditions, and configurable for uni-directional or bi-directional operation


Wireless remote control Blue Flag Indication (BFI™) systems from RailComm boost productivity by eliminating the need to drive out to both ends of the train to manually place the blue flag, and later drive out again to remove them.

Blue Flag Remote Control

With RailComm’s Blue Flag automation system, once a train pulls into the assigned location, the blue flags are remotely turned on using RADiANT data radio technology and control cabinets on each end of the blue flag zone. Remote control of blue flags can be achieved through a central PC located in the Yard Tower or using a control panel in the yard area.

In addition to controlling the blue flags, RailComm’s DOC® (Domain Operations Controller) software also provides the option to log the name and trade of each craft controlling the flag, along with the date and time of blue flag activity. This information can be used in FRA reporting, and eliminate the need for a manual logging process.

LED Indicators

The RailComm BFI solution uses blue LED indicators to indicate protection for any mechanical, repair or fueling operations. Radio remote control activates blue LED light indications that are installed adjacent to the protected track. The RailComm BFI can be configured as a bidirectional indicator, utilizing two blue LED indicators, or as a unidirectional indicator using one blue LED indicator.

Field control panels use LEDs to visually display status of blue flags. Keypad on panel provides option for data entry and security of turning the system on and off using a password.  Keylock offers additional method for security.

LED Light Indicator

Aspect diameter: 8”
Height: 17.1”

Typical Blue Flag System Layout:

Blue Flag Indicator Layout

The RailComm blue flag system provides flexible system options, controlling blue flags from a Central PC and/or using a field control panel.

BFI System Specifications

  • Power (Solar/AC)
  • Input Voltage: 9 – 28 VDC
  • Nominal Input Voltage: 12 VDC
  • Input Current (per indicator):
  • 150 mA at 12 VDC
  • 130 mA at 12 VDC (Dim Mode)