Photos from the Arizona Truck Driving Championships in Tempe, Ariz., April 13, 2019.

Nikola Motor Company showcased five zero-emission products at its Nikola World event in Scottsdale, Ariz., April 16, 2019, including its hydrogen fuel cell Class 8 Nikola Two for long-range driving.

Photos from the Louisiana Truck Driving Championships in Baton Rouge, La., March 29-30, 2019. (John Ballance for Louisiana Motor Transport Association)

Photos from the 2019 Mid-America Trucking Show at the Kentucky Exposition Center in Louisville, Ky., March 28-30, 2019.

Look back at photos from American Trucking Associations' 2019 Technology & Maintenance Council annual meeting at the Georgia World Congress Center in Atlanta, March 17-21.

These are TT's Top 10 most popular cartoons of 2018, ranked by the number of views on our website. The cartoons by Philip "Shade" Kightlinger are one of the most popular features all year on TTNews.com.

Photos from Wreaths Across America at Arlington National Cemetery in Virginia on Dec. 15.

Photos from the 2018 Management Conference & Exhibition at the Austin Convention Center in Austin, Texas, Oct. 27-31.

Titleists from NTDC 2018 show off their hardware after a busy Championship Saturday. (Photos by John Sommers II for Transport Topics)

A peek into the North American Inspectors Championship, conducted by the Commercial Vehicle Safety Alliance. NAIC is a competition and training event for North American commercial vehicle inspectors. (Photos by John Sommers II for Transport Topics)