In the four-month period following the April 1, 2018 ELD hard enforcement date (April – July 2018), the industry’s hours of service (HOS) compliance rate is showing a 45% improvement over the four-month period just prior to the December 2017 compliance date. See FMCSA’s compliance infographic here: No word yet from FMCSA on whether ELD use is having a positive effect on industry crash rates.