All Truck and Trailer Mounted Attenuators shall: 1. Be a model that has been successfully crash tested and certified in accordance with AASHTO Manual for Assessing Safety Hardware (MASH) Test Level 3 requirement with compatible support vehicle attachment installation as approved by the engineer. 2. Be a model that has been successfully crash tested and certified with a Flashing Arrow Panel (FAP)/Changeable Message Sign (CMS), in accordance with, MASH Test Level 3 requirement with compatible support vehicle attachment installation as approved by the engineer if the combination option is selected. 3. Provide a copy of the FHWA approval letter and/or supporting literature regarding the successful MASH Test Level 3 crash tests. 4. Be a model that complies with MoDOT’s specifications as follows. DESCRIPTION OF TMA AND TrMA SUPPORT VEHICLE: MoDOT has the need for TMAs and TrMAs to be installed on single and tandem axle trucks. The single axle trucks have 28,000 to 34,000 GVW, tare at 11,000 lbs to 16,000 lbs. for TMA applications. The tandem axle trucks have a 42,000 to 62,000 GVW rating and tare at 18,000 to 26,000 lbs. MoDOT has special applications, such as striping nurse trucks, where TMAs are needed for trucks, which may start the day at 66,000 lbs and end the day at about 24,000 lbs. MoDOT will select the best model to best meet our needs for routine and special operations with consideration of each models recommended capabilities. Vendors shall provide their recommended gross vehicle operating weight range for every model. MoDOT will consider these operating ranges to meet special needs. ELECTRICAL/LIGHTING SYSTEM: Electrical power for the stop, turn and tail lights on the unit shall be via a 7-pin male connector (SAE J560 Standard, most recent revision) on the unit to fit a 7-pin female connector on the rear of the support vehicle. The power requirements of the TMA and TrMA shall be compatible with the 12-volt electrical system of the TMA and TrMA support vehicle. Each unit shall be equipped with a four lamp stop, a turn and tail lighting system and a standard three lamp identification light bar system, configured in such a manner as to provide proper lighting when the attenuator is in the horizontal (protective) mode or in the vertical (traveling or non-protective) mode. Turn signal lights on the TMA shall operate independently of the brake lights. All wiring terminal connections shall be crimped, soldered, heat shrink and with weatherproof connectors.
