Preface This is the second edition of CSA D435, Accessible transit buses. It supersedes the previous edition published in 2002. This Standard provides requirements specific to vehicles used by transit operations in their routine services. It is intended that this Standard be used to enable transit operations to integrate persons with disabilities into their normal services. This Standard is designed to complement CSA D436 which is applicable to over-the-road (inter-city) buses. It is also intended to be used in conjunction with standards issued by Transport Canada under the federal Motor Vehicle Safety Regulations. The following are the significant changes made to this edition: a) design requirements for mobility aid securement and occupant restraint (MASOR) systems (Clause 7.4) have been modified; b) requirements for the positioning of MASOR systems (Clause 7.3.2) have been modified; and c) requirements for the anchor points for MASOR systems (Clause 7.3.3) have been modified. Scope 1.1 This Standard applies to accessible transit buses, as defined in Clause 3. 1.2 The values given in SI units are the units of record for the purposes of this Standard. The values given in parentheses are for information and comparison only. 1.3 In this Standard, "shall" is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the Standard; "should" is used to express a recommendation or that which is advised but not required; and "may" is used to express an option or that which is permissible within the limits of the Standard. Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material. Notes to tables and figures are considered part of the table or figure and may be written as requirements. Annexes are designated normative (mandatory) or informative (non-mandatory) to define their application.