6Type-1 Functional requirements#

The functional requirements of a Type-1 PTSS shall comply with the clauses in this document.

6.1Type-1 PTSS start up sequence#

A Type-1 PTSS traffic signal start-up sequence shall not take place until the PTSS has undergone a complete system check to establish that all components are functional, including a self-test of each lantern and that the communication system has been established and verified working to all PTSUs and the master controller.

6.1.1Type-1 Start-up interlocks#

Equipment shall be provided with interlocks to prevent the PTSS from operating in other than the flashing yellow mode unless all of the essential modules are correctly fitted.

6.1.2Type-1 Manual mode of operation start-up sequence#

In the manual mode of operation, the Type-1 PTSS shall be designed to start up in the following sequence:

  1. a)Display a flashing yellow signal (0.5 second on and off) for a period of 5 seconds on all portable traffic signals that are in use.
  2. b)Display an all-red display on all portable traffic signals that are in use for a minimum of 5 seconds before a signal state change can be initiated by an operator.

6.2Type-1 Operator controls#

A Type-1 PTSS shall only be operated via a HRC.

6.3Type-1 Controller requirements#

A Type-1 PTSS shall comply with the requirements specified below:

  1. a)Support all processing associated with the communications for the paired Portable Traffic Signals.
  2. b)Ensure an all-red interval is in place before any green signal can be displayed.
  3. c)Ensure that the requested signal is displayed on the correct Portable Traffic Signal and carries out all associated processing and monitoring functions.
  4. d)Provide software interlocking to ensure conflicting green / green displays cannot occur whilst utilising the shuttle control type.
  5. e)Provide software interlocking to ensure only one PTSU can be in operation whilst utilising the gating control type.
  6. f)Ensure that the yellow time is set to 4 seconds and is not changeable.
  7. g)Monitor, log (where required) and report the operation of each connected Portable Traffic Signal individually.
  8. h)Not allow signal state changes to be made by the operators until 5 seconds has elapsed since the start-up procedure has completed.
  9. i)Allow Portable Traffic Signals to be controlled individually or as a pair when in operation.
  10. j)Accept valid commands and reject invalid commands.
  11. k)Have a visual indicator as specified in AS 4191 for visual monitoring of lantern.

6.4Type-1 Hand-held remote controller#

Operation of a Type-1 PTSS is via an HRC.

The following requirements shall apply to the use of the HRC:

  1. a)If HRC is wireless, it shall transmit with a unique ID or other security arrangements to ensure that the PTSUs paired with that PTSS can only be changed by the paired HRC.
  2. b)The HRC shall be capable of switching the PTSS displays on / off. The PTSS displays shall only be shut-down once the start-up / shut-down button is pressed and held for 5 seconds. After 5 seconds the displays shall turn off and all aspects shall be blank.
  1. c)The HRC shall provide a button to initiate the start-up procedure on the PTSS as per Clause 6.1.2. It shall only be active once the HRC has successfully paired to one or 2 PTSU(s).
  2. d)The HRC shall have a facility to allow the operator to select which PTSUs to pair / connect to.
  3. e)The HRC shall provide a self-test button. The button shall test each paired signal unit by activating a signal test procedure that displays a green signal, yellow signal, red signal and a blank signal for 0.1-0.2 seconds each and in the listed order.
  4. f)The HRC shall provide visual confirmation of the state of each PTSU under control as well as a fault alarm indicator (with audible warning) for each PTSU. A fault alarm will trigger with the scenarios listed in Clause 8.
  5. g)The HRC shall provide a battery level indicator and provide battery status information for the HRC and both PTSUs.
  6. h)The HRC shall indicate whether zero, one or 2 portable traffic signals are paired with the HRC.

6.5Type-1 Portable traffic signal unit#

The following requirements shall apply to the use of each Type-1 PTSU:

  1. a)A PTSU shall be controlled by only one HRC.
  2. b)A HRC shall not control more than 2 PTSU's at the same time.
  3. c)When power is connected to a PTSU, the default state shall remain blank until a start-up command is received from the HRC.
  4. d)After the start-up procedure has been completed the active aspect shall be red until 5 seconds has elapsed and a command to change the signal is received from the HRC.
  5. e)Each PTSU shall be equipped with tilt and inclination sensors.
Source: MRTS264 · pages 8–10 Open PDF at this page Search this document