2Terminology#
This section provides abbreviations and definitions of terms used throughout the chapter.
Table 2(a) – Acronyms
| Acronym | Expansion |
|---|---|
| AASHTO | American Association of State Highway and Transportation Officials |
| ADR | Australian Design Rule |
| AIB | Automatic Impact Braking |
| AS | Australian Standard |
| GVM | Gross Vehicle Mass |
| MASH | Manual for Assessing Safety Hardware |
| MUTCD Part 3 | Queensland Manual of Uniform Traffic Control Devices Part 3: Traffic control for works on roads |
| NCHRP | National Cooperative Highway Research Program |
| NHVR | National Heavy Vehicle Regulator |
| TGS | Traffic Guidance Scheme |
| TL | Test Level |
| TMA | Truck of Trailer Mounted Impact Attenuator (see definition) |
Table 2(b) – Definitions
| Term | Expansion |
|---|---|
| AIB | A system that, in the event of an impact with the rear of the Impact Attenuator Unit, will apply the brakes of the TMA host vehicle automatically; the system must apply brakes on all wheels of the rear axle/s of the host vehicle |
| Competent person | A person who has acquired through training, qualification and/or experience, knowledge and skills to carry out a particular task |
| GVM | Means the maximum loaded mass of a vehicle: • stated on the vehicle’s compliance plate, or • stated in a way prescribed under a regulation. |
Table 2(b) – Definitions
| Term | Expansion |
|---|---|
| Host vehicle | A host vehicle is a vehicle that has an impact attenuator unit attached to it permanently or to which a trailer mounted impact attenuator unit can be attached |
| Impact | In mechanics, an impact is a high force or shock applied over a short time period when two or more bodies collide (such a force or acceleration usually has a greater effect than a lower force applied over a proportionally longer time period) / an impact that may affect the integrity or operation of the vehicle and / or Impact Attenuator Unit |
| Impact Attenuator Unit | (Also known as a ‘crash cushion’ or ‘crash attenuator’) A device intended to reduce the damage done to structures, vehicles and motorists resulting from a motor vehicle collision, designed to absorb the vehicles’ kinetic energy and / or redirect the vehicles away from the hazard, and from roadwork machinery or workers |
| TGS | A diagram that illustrates the layout, signs, devices and general arrangement to warn and guide traffic around, past, or, when necessary, through a work site or temporary hazard |
| TL2 | Applies to Impact Attenuator Units that meet MASH Test Level 2 (basic) requirements (TL2) 70 km/h |
| TL3 | Applies to Impact Attenuator Units that meet MASH Test Level 3 (basic) requirements (TL3) 100 km/h |
| TMA | A combination of Host Vehicle and Impact Attenuator Unit, either mounted to the Host Vehicle or towed by the Host Vehicle; the combination must meet the requirements of this document |
| TMA Operator | A person meeting the requirements of Section 7 of this chapter |