EAGLE ROCK, Mo. -

The Missouri State Highway Patrol says a 49-year-old man from Diamond died in a head-on collision in Barry County just before noon Tuesday.

Martin A. Jacoby was riding a 2010 Yamaha motorcycle eastbound on Missouri 86 in Eagle Rock when he was struck head-on when the driver of a 1998 Chevrolet Venture van pulled into his path. 

The driver of the van was not hurt, but took a field sobriety test as is required by law.

Both vehicles were totaled in the crash.  Jacoby died despite wearing a helmet.