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Jackknifed Semi Disrupts Traffic On Highway 36

BOULDER COUNTY, Colo. (CBS4)- A jackknifed semi truck blocked eastbound lanes of US 36 on Monday.

The semi was jackknifed on the hill approaching Davidson Mesa about 11:37 a.m. That blocked all lanes of traffic except for the express lane. Traffic was getting through in that lane but there were significant delays in the area.

US36 Crash CDOT_frame_14863
(credit: CDOT)

Investigators with the Colorado State Patrol believe the semi driver suffered a medical incident that triggered the crash. The driver, a 61-year-old male from Missouri, passed away either en route or at the hospital.

us 36 crash
Copter4 flew over the jack-knifed semi on US 36 (credit: CBS)

Another crash involving two vehicles and an ambulance also contributed to the traffic delays. The ambulance was responding to the jack-knifed semi when it was side-swiped by another vehicle.

Copter Monday 1225pm_frame_14966
(credit: CBS)

No one was injured in the second crash.

Drivers were urged to take an alternate route and avoid the area.

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