Catalog Search Results
Author
Pub. Date
1974.
Physical Desc
1 online resource (iii, 16 pages) : illustrations
Language
English
Description
This particular Colorado study was initiated to gather and analyze facts on the performance of embankments constructed without moisture and/or density control, and to draw specific conclusions which might assist designers of future roadway embankments.
Publisher
Colorado Division of Highways, Planning and Research Division
Pub. Date
1972.
Physical Desc
1 online resource (17 pages) : illustrations
Language
English
Description
Several years before the publication of the 1970 Manual on Uniform Traffic Control Divices (MUTD), the Colorado Division of Highways initiated field tests to investigate the relative brightness and durability of yellow and white paint stripes in the beaded and unbeaded condition and to determine the acceptability of partially-beaded centerlines. After the issuance of the 1970 edition of the Manual, the Division sought and received FHWA approval for...
Author
Publisher
Colorado Department of Transportation, Applied Research & Innovation Branch
Pub. Date
2022.
Physical Desc
1 online resource (various pagings) : illustrations
Language
English
Description
Wildlife crossing structures (WCSs), underpasses, and overpasses are widely used for the safe travel of larger wildlife species across roads and highways, reducing wildlife-related vehicle collisions to drivers. WCSs are often expensive to build and maintain, and therefore determining a cost-effective, optimal design is a challenge faced by departments of transportation across the United States and elsewhere. Although much research has been conducted...
Author
Publisher
[Colorado Natural Heritage Program]
Pub. Date
[2017].
Physical Desc
1 online resource (ii, 12 pages) : illustrations, maps
Language
English
Description
Pueblo goldenweed (̲Onopsis puebloensis) is a yellow flowered plant in the Asteraceae (Sunflower Family) that is known only from the Arkansas Valley in Pueblo and Fremont counties, Colorado, and is considered to be imperiled at a global and state level. One of the biggest conservation issues for this imperiled plant species is the lack of awareness of its existence and status. Avoiding or minimizing impacts to this species during road maintenance...
Publisher
Colorado Dept. of Transportation
Pub. Date
[2001]
Physical Desc
1 online resource (1 video file (10 minutes, 30 seconds)) : digital, sound, color
Language
English
Description
"An investigative study by the Research Development and Technology Branch of the Colorado Department of Transportation"--VHS cassette label.
Author
Publisher
[Colorado Natural Heritage Program]
Pub. Date
[2017].
Physical Desc
1 online resource (ii, 13 pages) : illustrations, maps
Language
English
Description
Piceance bladderpod is a low, rosette-forming, yellow-flowered plant in the Brassicaceae (Mustard Family) that is found chiefly on outcrops of the Green River Shale Formation in the Piceance Basin. It grows on ledges and slopes of canyons in open area of pinon juniper communities.
Publisher
Colorado State Department of Highways, Research Coordination Section
Pub. Date
[1979]
Physical Desc
1 online resource (43 pages) : illustrations
Language
English
Description
All highway and related transportation system air quality studies within the jurisdiction of the Department of Highways shall conform to the procedure, format and content described in these guidelines. The guidelines shall be included in all consultant agreements for environmental assessments, environmental impact statements and air quality studies and shall further be a part of all agreements with and binding upon any sub-consultants conducting air...
Author
Publisher
Colorado Natural Heritage Program
Pub. Date
[2017].
Physical Desc
1 online resource (ii, 25 pages) : illustrations, maps
Language
English
Description
Pagosa bladderpod (Physaria pruinosa=Lesquerella pruinosa) is a small, rosette-forming, yellow-flowered plant in the Brassicaceae (Mustard Family) that is known only from two counties in southern Colorado and one county in northern New Mexico. Avoiding or minimizing impacts to this species during road maintenance activities will effectively help to conserve its habitat and is unlikely to confer substantial impacts on road maintenance goals and projects....
Author
Publisher
Colorado Division of Highways, Research and Special Studies Section
Pub. Date
[1972]
Physical Desc
1 online resource (14 pages) : illustrations
Language
English
Description
Air pollution is a matter of concern everywhere, but at high altitudes it may have more significance because of the difficulty that some people have breathing rarefied air. Much of the construction in Western states is above the 6,000 foot level, and highways have been constructed above the 14,000 foot level. The results of tests for carbon monoxide, hydrocarbons, nitrogen oxides and particulates at construction sites in Colorado are presented in...
Author
Publisher
[Colorado Natural Heritage Program]
Pub. Date
[2014].
Physical Desc
1 online resource (ii, 10 pages) : illustrations, maps
Language
English
Description
Bell's twinpod (Physaria bellii) is a small, yellow-flowered plant in the Brassicaceae (Mustard Family) that is known only from the Front Range in Boulder and Larimer counties, Colorado, and is considered to be imperiled at a global and state level. One of the biggest conservation issues for this imperiled plant species is the lack of awareness of its existence and status. Avoiding or minimizing impacts to this species during road maintenance activities...
Author
Publisher
[Colorado Natural Heritage Program]
Pub. Date
[2017].
Physical Desc
1 online resource (ii, 14 pages) : illustrations, maps
Language
English
Description
Cushion bladderpod (Physaria pulvinata) is a low, compact plant in the Brassicaceae (Mustard Family) It is densely matted and hairy, less than 3 dm across with 4-petaled yellow flowers. It is known from widely scattered outcrops of grayish Mancos shale in San Miguel and Dolores counties, and is considered to be imperiled at a global and state level. One of the biggest conservation issues for this imperiled plant species is the lack of awareness of...
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