In 1939, the
Golden Gate International Exposition opened on
Treasure Island in
San Francisco Bay. In response, the CB&Q, D&RGW and WP decided to operate a train that could take passengers to the event. Service on the
Exposition Flyer began on June 10, 1939. In the beginning, the train used steam locomotives as motive power and consisted of the heavyweight
Pullman standard cars. In later years, however, the train would operate using diesel power and in the final months of service, used
streamlined passenger cars. Initially, the train was supposed to be a temporary route, although, due to the train's popularity, which made it a significant rival to the
City of San Francisco, the Chicago-Oakland train operated jointly by the
Chicago & Northwestern,
Union Pacific and
Southern Pacific, it remained in operation until 1949. In 1949, the CB&Q, D&RGW and WP replaced the
Exposition Flyer with the all streamlined
California Zephyr, which operated over the same route.
Accidents • On the night of September 22, 1941, the eastbound
Exposition Flyer collided head-on with a steam locomotive near
Sunol, California. The steam locomotive engineer's watch was running slow, and he had failed to move his engine onto a siding. Three people, including the engineer and fireman on the
Exposition Flyer, were killed. • On April 3, 1946, the
Exposition Flyer derailed in eastern Nevada after passing over a switch at , killing two passengers. • On April 25, 1946, the
Exposition Flyer was involved in its deadliest accident. The westbound
Advance Flyer, another train operated by the CB&Q, made an emergency stop in the Chicago suburb of
Naperville, Illinois just short of the
CB&Q depot. The
Exposition Flyer, travelling at around a short distance behind on the same track, rear-ended the
Advance Flyer. 45 people were killed in the
Naperville train disaster, including the
Exposition Flyer's fireman. == Route ==