Noxious weeds found in the state of Colorado along roadways during 2012, from the Colorado Department of Transportation (CDOT).

Noxious weeds found in the state of Colorado along roadways during 2010, from the Colorado Department of Transportation (CDOT).

Noxious weeds found in the state of Colorado along roadways during 2013, from the Colorado Department of Transportation (CDOT).

Noxious weeds found in the state of Colorado along roadways during 2014, from the Colorado Department of Transportation (CDOT).

Noxious weeds found in the state of Colorado along roadways during 2010, from the Colorado Department of Transportation (CDOT).

Noxious weeds found in the state of Colorado along roadways during 2012, from the Colorado Department of Transportation (CDOT).

Noxious weeds found in the state of Colorado along roadways during 2013, from the Colorado Department of Transportation (CDOT).

Noxious weeds found in the state of Colorado along roadways during 2014, from the Colorado Department of Transportation (CDOT).