9Type-1 Mechanical and physical requirements#
9.1Type-1 General#
The mechanical and physical requirements defined in MRTS201 General Equipment Requirements and MRTS61 Mounting Structures for ITS Devices apply to the PTSS and associated control electronics defined by this Technical Specification. Portable traffic signal lanterns shall be capable of being mounted on a pole that connects to a barrow or tripod support structure.
All compartments that contain any electronic components shall have an ingress protection rating of at least IP45 as defined in AS 60529. A certificate or letter of compliance from a NATA approved testing facility shall be made available to the department upon request.
Support structure design documentation for Type-1 devices, shall be submitted to the Principal’s representative for acceptance 28 days prior to manufacture. Hold Point 3
The PTSS shall be constructed from durable materials to enable installation and reliable operations.
A Type-1 PTSS is intended as a lightweight device to ensure easy loading / unloading from a vehicle or trailer to the intended installation site by one or 2 persons.
9.2Type-1 Design life#
Unless otherwise specified, the design life of components shall be as follows:
- a)PTSS mechanical components and structure: a minimum of 20 years.
- b)PTSS and HRC electrical components and systems: a minimum of 10 years.
- c)Lantern body, structural supports and any mechanical accessories, including any protective coatings, are designed for a service life of at least 20 years.
9.3Type-1 PTS mounting#
9.3.1Type-1 Tripod / Barrow mounts#
When the PTSU is mounted on a tripod or barrow (Figure 9.3.1), the portable traffic signal shall have a mechanical system which allows the portable traffic signal to be safely secured for transportation. The mechanical system shall also allow for the PTSU to be safely erected on site to ensure the unit is clearly visible. A Type-1 PTSS barrow or tripod shall have the capability to use a ballast such as sandbags to stabilise the structure.
The mechanical systems shall also ensure that the PTSU cannot rotate due to wind gusts up to the ultimate wind speed the structure is designed for.
9.3.2Type-1 Surface finishes#
The external finishes of equipment items shall be resistant to corrosion. All metal surfaces shall be painted in the range of high visibility colours from X15 Orange to X13 Marigold as specified in AS 2700. All surface finishes of PTSSs shall comply with AS 4191. The finish of lanterns, target boards and visors shall comply with AS 2144.
9.3.3Type-1 Mounting pole#
The mounting pole for a Type-1 PTSU shall have a height to the base of the signal lantern of 1.5 m to 2 m.
9.3.4Type-1 Dimensions#
The dimensions for a Type-1 PTSU shall take into consideration the sizes of the individual components required to be supported by the barrow or tripod. Each PTSU is intended to be loaded and unloaded from a vehicle by up to 2 persons and therefore dimensions shall not exceed a size that will make this difficult or unsafe.
9.3.5Type-1 Wind loading#
A Type-1 PTSS shall be designed to maintain its intended orientation and position when subjected to wind speeds up to 20.0 m/s.
20.0 m/s wind speeds takes into account the combined effects of prevailing weather conditions and turbulence from passing heavy vehicles.
Ballasts such as sandbags can be used to increase stability of each PTSU and any associated components. The manufacturer shall submit wind load test reports which stipulate the maximum wind speed that the PTSS can be subjected to and any ballast requirements.
9.3.6Type-1 Battery, controller and communications compartment#
Any storage compartments of the PTSU shall have dust and moisture ingress protection of at least IP45.
Each Type-1 PTSU shall have a switch fitted externally to disconnect the battery from the PTSU. The switch shall be mounted so that it is not easily accessible to the general public.
9.3.7Type-1 Stabilisers#
The PTSS shall be suitably designed to ensure stability of each PTSU when positioned on site. The type of stabilisers shall:
- a)allow for swivel
- b)be located on the 4 corners of a barrow (where a barrow is used), have fixed locations engineered to stabilise the barrow or tripod with the PTSU fully extended while meeting wind loading conditions
- c)be wind-down and readily storable for safe and secure moving
- d)have a load rating sufficient for levelling of the PTSU
- e)have a locking mechanism with removable handles and secure drive nuts, and
- f)use sandbags to increase stability.
9.4Type-1 Traffic signal lantern#
The traffic signal lantern requirements indicated below specifically refer to the physical lantern and not the electronic or optical performance requirements.
The traffic signal lantern and associated control electronics shall comply with the relevant requirements of MRTS201 General Equipment Requirements. All physical requirements of the lantern shall comply with AS 2144 unless otherwise specified.
A Type-1 lantern shall also have a visual indicator as specified in AS 4191 for Lantern Monitor.
9.4.1Type-1 Target boards#
Type-1 PTSS with a target board may be required if the visibility is compromised based on the visibility assessment required by the Guideline – Traffic Management at Works on Roads.
Type-1 PTSS target boards shall be manufactured from aluminium complying with the requirements of AS 4191.
9.4.2Type-1 Visors#
Each aspect of each lantern shall be fitted with a visor in accordance with the requirements of AS 2144.
9.5Type-1 Hand-held remote controller#
The hand-held remote controller shall be lightweight, have a ruggedised construction, and be resistant to mishandling, shock and vibrations. The HRC shall have an ingress protection rating of at least IP65 as defined in AS 60529.