ASME RT-1:2020 pdf download.Safety Standard for Structural Requirements for Light Rail Vehicles and Streetcars.
The objective of the passive safety requirements in this Standard is to reduce the risk of passenger injury and damage to equipment resulting from collision accidents by providing a means of protection when other possibilities of preventing an accident have failed. In the event of a collision,, application of this Standard provides protection for the occupants of new designs of crashworthy vehicles through the preservation of structural integrity and reducing the risk of overriding and limiting decelerations. This Standard does not extend to the design of the vehicle interior structures that max’ help reduce inju risk caused by impact between the ocpants and the vehicle interior, beyond limiting vehicle acceleration and consequential secondary impact velocity of passengers colliding with interior surfaces. In addition, this Standard provides measures for design of light rail vehicles (LRVs) and streetcars with the goal of reducing risks to street vehicles and pedestrians when involved in collisions.
1.1 Subjects Not Addressed by This Standard
There are several design considerations issues related to safety that are not addressed in this Standard, such as the following:, but not limited to
(a) structural repairs
(b) fatigue
(c) corrosion
(d) fire protection
(e) interior vehicle design
(fi emergency egress from vehicle
(g) inspection and maintenance
(Ii) operator seat belt
1.2 Effective Date
This Standard applies to carbodicc of newly constructed light rail vehicles and streetcars for transit passenger service ordered 180 days following the date of issuance of this Standard that is issued by the Rail Transit Vehicle (RTV) R3 Standards Committee and ASME.
2 DEFINITIONS
This Standard relies, where practical, on terms already in use by ASME, the American Public Transportation Association (APTA), and the Institute of Electrical and Electronics Engineers (IEEE). For the purposes of this Standard, the following definitions apply:
anficliniber: a structural member or mechanism located at each end of the vehicle1 used to engage an opposing vehicle, car or other coupled or not, vehicle to resist relative vertical travel between the two carbodies during a collision.
articulation: a rotating connection sometimes used at the center of a vehicle or at the intermediate ends of carbody sections to allow negotiation of tracks with various vertical and horizontal profiles.
average collision acceleration: the average computed longitudinal acceleration of each car-module of at the vehicle center of gravity. The average computed using a 100 ms simple moving average acceleration is evaluated over the duration period of time from first contact between colliding vehicles to the time when the contact force between vehides first returns to a magnitude of thc collision event and averaged over each car-module zero.ASME RT-1 pdf download.