Important Phone Numbers
| SUBJECT | AGENCY | TELEPHONE |
| Accidents Reporting | Colorado State Patrol | (303)232-5602 |
| Operating Authority |
Public Utilities Commission MCS One Stop Shopping |
(303)894-2000 (303)205-5691 |
| Carrier Safety Ratings | Colorado State Patrol | (303)232-5602 |
| Clean Air Act | MV Emissions Section | (303)205-5603 |
| Commercial Drivers License |
MV CDL Section MCS One Stop Shopping |
(303)205-5983 (303)205-5691 |
| Driver Qualifications |
Colorado State Patrol MCS Port of Entry Section |
(303)232-5602 (303)205-5691 |
| Drug Testing | Colorado State Patrol | (303)232-5602 |
| Hazardous Materials Transp. |
Colorado State Patrol MCS Port of Entry Section |
(303)239-4546 (303)205-5691 |
| Hazardous Waste Transp. | Colorado State Patrol | (303)239-4546 |
| Hours of Service |
Colorado State Patrol MCS Port of Entry Section |
(303)232-5602 (303)205-5691 |
| Intelligent Transp. Systems | CDOT | (303)757-9801 |
| Efficiency Act (*ISTEA) | CDOT | (303)757-9801 |
| Interstate Registration |
MCS IRP Section MCS One Stop Shopping |
(303)205-5968 (303)205-5691 |
| Intrastate Registration |
MV Registration Section County Registration Offices |
(303)205-5607 |
| Longer Combination Vehicles |
CDOT Extra Legal Permitting MCS One Stop Shopping MCS Port of Entry Section |
(303)757-9539 (303)205-5691 (303)205-5691 |
| Motor Carrier Safety Assistance Program |
Colorado State Patrol MCS Port of Entry Section |
(303)232-5602 (303)205-5691 |
| Nuclear Materials Transp. | Colorado State Patrol | (303)232-5602 |
| Safety Compliance Reviews | Colorado State Patrol | (303)232-5602 |
| Safety Regulations |
Colorado State Patrol MCS Port of Entry Section |
(303)232-5602 (303)205-5691 |
| Single State Registration Program | Public Utilities Commission | (303)894-2000 |
| Size and Weight Requirements |
MCS Port of Entry Section MCS One Stop Shopping |
(303)205-5691 (303)205-5691 |
| Special Fuel Requirements | MCS Fuel Section | (303)205-5968 |
| Speed Limits | Colorado State Patrol | (303)232-5602 |