A city work crew had to scramble off a bridge two years ago to avoid an oncoming O-Train because the operator didn't know they were there.

The "near-miss situation" is one of 14 dangerous incidents in Ottawa since 2000 reported to the Transportation Safety Board and released to the CBC under an Access to Information request.

None of the 14 Ottawa incidents resulted in collisions, derailments or injuries, but there were a few close calls.

For the most part, the incidents involved trains — including VIA passenger trains — proceeding down the track without proper authorization.

O-Train incident prompted city to change rail work rule

In one incident in 2001, a passenger train overshot a stop signal at Ottawa's main VIA Station. The crew was removed while rail officials investigated.

Later that same year, another VIA train had to brake suddenly to avoid a possible collision with some heavy equipment at a crossing.

ot-o-train

In July 2011, city workers inspecting a bridge had to scramble to avoid an O-Train approaching at 55 kilometres per hour. ((CBC))

Several incidents involved communication breakdowns between rail authorities and work crews on the tracks.

In 2010, a CN freight train had to brake suddenly to avoid a crew on the Rideau River bridge.

And in July 2011, in what the TSB classifies as a "near-miss situation," city workers inspecting another bridge over the river had to scramble to avoid an O-Train approaching at 55 kilometres per hour.

As a result of that incident, the city decided all non-essential track maintenance must be performed overnight when the O-Train's not running. Daytime work requires special permits.