RT Journal Article SR Electronic T1 Transportation policy and injury control JF Injury Prevention JO Inj Prev FD BMJ Publishing Group Ltd SP 362 OP 363 DO 10.1136/ip.2009.024240 VO 15 IS 6 A1 Todd A Litman YR 2009 UL http://injuryprevention.bmj.com/content/15/6/362.abstract AB