four-in-hand print from Zazzle.com

four-in-hand print from Zazzle.com

truck

logging truck

http://www.shutterstock.com/pic.mhtml?id=39661561

tanker truck

http://www.shutterstock.com/pic-39661549/stock-photo-tanker-truck.html

heavy duty roller at a construction site

http://www.istockphoto.com/file_closeup.php?id=10885200

concrete mixer

skaljac - Fotolia.com

http://www.fotolia.com/id/17755038