BusinessPhoto: Dr. Benjamin Carson speaking at Spring Symposium 2013CCJ Staff (CCJ)May 21, 2013Updated May 20, 2014 Add us as a preferred source on Google Related StoriesBusinessBig Data and fleets: Using data to save fuel, plan operationsBusinessDOT secretary nominee set for Senate committee hearingBusinessSmart shops: Maintenance tech is transforming fleet repair foreverPartner InsightsContinental's Extreme Duty Multi V-Belts designed for extreme temperaturesTop StoriesSafety & ComplianceFeds reclassify marijuana, still banned for truckersMarijuana, which accounts for nearly 60% of all positive drug tests among commercial drivers, remains a prohibited substance under 49 CFR Part 40.TechnologyHow weigh station and toll bypass tech help fleets save on fuel costsSafety & ComplianceLawmakers press HHS on drug testing standardsSafety & ComplianceAvoiding ELD violations: 'Details are always your friend'Featured SponsorContinental's Extreme Duty Multi V-Belts designed for extreme temperaturesGet all the info on the top 250 trucking companies in AmericaView, sort and download the trucking industry’s most comprehensive ranking of for-hire carriers in North America, based on a blend of metrics including fleet size, annual revenue and number of drivers.White PapersGood for the Fleet, good for the communitySafer drivers. Stronger communities. Smarter operations. Discover how telematics and AI-powered fleet technology make it all possible.