The prevalence of speeding in crashes is only currently reported for fatal crashes in the United States of America (USA) using police reports, and the prevalence reported (27%) is well below that found in a national study that measured travel speeds (65%). The aim of this study was to explore how event data recorder (EDR) data from the National Automotive Sampling System – Crashworthiness Data System (NASS-CDS) database could be used to estimate the prevalence of speeding in crashes in the USA. EDR files collected as part of the NASS-CDS in 2015 were examined to determine the presence and extent of speeding, provided they met certain criteria. AIS coded injury data was also extracted when available to examine speeding by injury severity. 335 EDR files were identified as meeting the criteria. 188 of these had complete AIS coded injury information. From this sample, it was found 61% were speeding, but this reduced to 44% if NASS-CDS weightings were applied. Speeding by more than 10 mph was found in 26% of crashes (16% weighted). Speeding was found to increase with increasing injury severity: 76% of MAIS 3+ crashes involved speeding, and 52% involved speeding by more than 10 mph. EDR data was found to be a useful source of travel speed data that may be used to examine speeding in the USA. It indicates that speeding is a larger problem in crashes than suggested by the current method that uses police reports. Expanding the sample size by using more years of data and calculating the change in impact speed and associated change in injury severity would allow for more robust estimates of the prevalence of speeding and its contribution to road trauma in the USA.