ANSI/RESNA WC-4:2017, Section 10 - 
Wheelchair containment and occupant retention systems for use in large accessible transit vehicles: systems for rearward-facing passengers

WC10 is based on ISO 10865-1, 2012 and was published in December 2017 as part of the American National Standards Institute/ Rehabilitation Engineering and Assistive Technology Society of North America (ANSI/RESNA) Wheelchair Standards/ Volume 4: Wheelchairs and TransportationThe standard is available for purchase at the RESNA American National Standards webpage or by contacting RESNA:

RESNA, 1700 N. Moore St, Suite 1540, Arlington, VA 22201-1903
Phone: 703-524-6686 Fax: 703-524-6630 TTY: 703-524-6639
E-mail: info@resna.org

Rearward-facing wheelchair passenger spaces (RF-WPS) that comply with WC10 are labeled as conforming with WC10 and should include a sign with the pictogram below.


Rationale for the Standard

Section 10 was added to WC-4 in recognition of the fact that not all vehicles and travel modes present the same level of injury risk to passengers. Large accessible transit vehicles (LATVs) that travel fixed routes at relatively low speeds on urban roads represent a travel situation where the likelihood of a moderate-to-severe crash is extremely low. Therefore, providing a level of safety during travel for passengers seated in wheelchairs in LATVs that is equivalent to passengers in vehicle seats or who are standing using handholds does not require the same level of wheelchair securement and occupant restraint needed for people traveling in smaller vehicles and in vehicles traveling at highways speeds, for which the likelihood of being involved in a significant crash is much higher. Section 10 adapts an international standard (ISO) for rear-facing wheelchair passenger spaces on LATVs, ISO 10865-1, to the U.S. market. 

Scope of Standard

WC10 applies to wheelchair passenger spaces intended for use by rear-facing wheelchair-seated occupants with a body mass greater than 22 kg, when traveling in accessible transport vehicles. It applies to RF-WPSs for use in LATVs used mainly on fixed route services when operated under normal and emergency driving conditions, where passengers are allowed to travel both sitting and standing. For the purposes of WC10 the term wheelchair includes scooters with three and more wheels. 

WC10 specifies design and performance requirements and associated test methods, requirements for manufacturer instructions and warnings to installers and users, as well as requirements for product labeling, and disclosure of test information.

The primary purpose of WC10 is to ensure adequate clearance space for wheelchair access, provide head and back support for the wheelchair occupant, and limit those movements of a rear-facing wheelchair that can result in hazardous occupant contact with the vehicle interior or injury to other passengers.

The provisions of WC10 apply primarily to a complete RF-WPS, but subsets of the provisions can be applied to components and subassemblies sold separately, as appropriate to the specific functions of the components and/or subassemblies they are intended to replace.