1、_ SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising there
2、from, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be revised, reaffirmed, stabilized, or cancelled. SAE invites your written comments and suggestions. Copyright 2014 SAE International All rights reserved. No part of this p
3、ublication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SAE. TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada) Tel: +1 724-776-497
4、0 (outside USA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org SAE values your input. To provide feedback on this Technical Report, please visit http:/www.sae.org/technical/standards/J2972_201403 SURFACE VEHICLE INFORMATION REPORT J2972 MAR2014 Issued 2014-03 Defi
5、nition of Road Vehicle Hands-Free Operation of a Person-to-Person Wireless Communication System or Device RATIONALE The purpose of this information report is to provide a comprehensive definition of hands-free, applied solely to the conversational portion of person-to-person wireless communications
6、systems or devices for application in road vehicles. Note: The limitation of the present definition to “person-to-person” wireless communications reflects awareness that future Intelligent Transportation System applications described in the literature will entail certain applications, such as those
7、involving electronic payment for tolls or parking, for example, that require additional manual operations on the part of drivers to, for example, select a particular credit/debit card and then confirm/agree to the payment. Such applications do not involve person-to-person wireless communications, an
8、d thus require special considerations that are not within the scope of this document. According to D, “hands-free” means “not requiring the hands for operation, esp. a telephone.” In a sampling of state laws in the U.S. pertaining to cellular telephone usage while driving, use of the term hands-free
9、 is restricted solely to the function of engaging in conversation (i.e., speaking and listening) while using cellular telephone without the use of either hand. Actions related to the use of a cellular telephone or other portable device while driving include locating the device, picking it up, locati
10、ng a hands-free accessory, placing it on the head or in the ear, looking up a cellular telephone number, dialing a cellular telephone number, answering a cellular telephone, texting, etc. The intent of this document is to define hands-free including all actions necessary to accomplish wireless commu
11、nications while driving. Limiting the scope of this definition to person-to-person wireless communications focuses on the mitigation of driver distraction. Such systems and devices have been in common use for more than 10 years and are widely used by drivers, and thus there exists sufficient researc
12、h data to support the development of policies and programs aimed at mitigating negative effects on driving safety. This limitation is also intended to avoid inhibiting future innovation in interface designs for new and evolving telematics features and functions. This document is intended to be techn
13、ology-neutral and, as such, does not address what technology is used to accomplish a hands-free state. As noted above in regard to payment applications, there may be current or future systems, devices, or interfaces that are not hands-free according to this definition and that nevertheless meet indu
14、stry, government, and legal standards and guidelines for safe use while driving. This definition is therefore not an adequate basis for determining which device or function uses avoid increased risk while driving. SAE INTERNATIONAL J2972 Issued MAR2014 Page 2 of 3 1. SCOPE This Information Report co
15、ntains a definition of road vehicle hands-free operation. This definition applies to driver inputs to a wireless communications device used for person-to-person wireless communications while driving. This report applies to both original equipment manufacturers and aftermarket devices. The definition
16、 does not apply to outputs, e.g., visual or haptic feedback, from a communication system or device, regardless of the modality of human-machine interface. It also does not apply to parallel or redundant manual control operating modes. 2. REFERENCES 2.1 Applicable Documents The following publications
17、 form a part of this specification to the extent specified herein. Unless otherwise indicated, the latest issue of SAE publications shall apply. 2.1.1 SAE Publications Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or 72
18、4-776-4970 (outside USA), www.sae.org. SAE J287 Driver Hand Control Reach 2.2 Related Publications The following publications are provided for information purposes only and are not a required part of this SAE Technical Report. 2.2.1 A representative state law is: New Jersey State Law P.L.2003, c.310
19、 (C.39:4-97.3-1.a.), http:/www.njleg.state.nj.us/2006/Bills/AL07/198_.HTM 2.2.2 Hands-free. (no date). D Unabridged. Retrieved March 21, 2013, from D website: http:/ 3. DEFINITIONS 3.1 SINGLE STEP MANUAL INPUT (SSMI) Single, distinct input needed from the driver to operate a manual control that star
20、ts, acknowledges, accepts, interrupts and/or ends a wireless communications session. The term SSMI Unit refers to a device capable of accepting such an input. NOTE 1: Examples include a single press (or press and hold) of a button, a single touch on a touch pad, or a single gesture. NOTE 2: This is
21、commonly referred to as “push-to-talk.” 3.2 PERSON-TO-PERSON WIRELESS COMMUNICATION SYSTEM OR DEVICE An in-vehicle (i.e., integrated into the vehicle) system or portable device that enables two or more persons to engage in free-form conversation either via voice or via speech-to-text/text-to-speech
22、conversion. NOTE: Person-to-person wireless communications do not include pre-formed messages sent automatically, such as an automatic message sent to a caller indicating that the recipient is busy driving and will call back later). SAE INTERNATIONAL J2972 Issued MAR2014 Page 3 of 3 4. ROAD VEHICLE
23、HANDS-FREE OPERATION OF A PERSON-TO-PERSON WIRELESS COMMUNICATION SYSTEM OR DEVICE 4.1 Meaning Road vehicle hands-free operation is defined as the operation of a person-to-person wireless communication system or device into which the driver can provide all control inputs needed for its use, without
24、use of either hand to hold or to control the system or device, including interfaces and accessories. 4.2 Exception Allowed for Single Step Manual Input A Single Step Manual Input (SSMI, defined in 3.1) is a permitted exception to the phrase “without use of either hand” in 4.1. The driver input neede
25、d to operate an SSMI Unit is considered a hands-free operation in an automotive context. 5. OPERATIONAL CONSIDERATIONS FOR AN SSMI UNIT 5.1 Hand(s) on steering wheel Manual operation of an SSMI Unit shall not require the removal of both hands from the steering wheel; i.e., at least one hand must rem
26、ain on the steering wheel. Both hands may be used for manual operation of an SSMI Unit if both hands can remain gripped on the steering wheel during operation of the SSMI Unit (e.g., buttons or other types of sensors can be activated with thumbs while both hands remain gripped on the steering wheel)
27、. NOTE: This exception to “without the use of either hand” is intended to provide a clear and simple means for a driver to transition into and out of use of a hands-free interface technology. 5.2 Operation of Multiple SSMI Units One hand may be used to operate separate SSMI Units to start, interrupt
28、, or end a wireless communications session. 5.3 Location of SSMI Unit If an SSMI Unit is used, it must be in a fixed location (whether permanent or docked) within the reach zone of a seatbelt-restrained driver (SAE J287). NOTE: For the purposes of this definition, controls located on a steering whee
29、l are considered “fixed.” 6. NOTES 6.1 Marginal Indicia A change bar (l) located in the left margin is for the convenience of the user in locating areas where technical revisions, not editorial changes, have been made to the previous issue of this document. An (R) symbol to the left of the document title indicates a complete revision of the document, including technical revisions. Change bars and (R) are not used in original publications, nor in documents that contain editorial changes only. PREPARED BY THE SAE SAFETY AND HUMAN FACTORS STANDARDS STEERING COMMITTEE
