2 CCR 601-1A-1 - Introduction

1.1 Authority

Section 43-2-147, C.R.S., authorizes the Colorado Department of Transportation ("Department") to regulate vehicular access to or from the State Highway System and establish a functional classification system. The State Highway Access Code, 2 CCR 601-1, ("Access Code") implements the state statute and sets standards for the regulation of access on State Highways. The Access Code is adopted by the Transportation Commission of Colorado ("Commission").

1.2 Purpose

Section Three of the Access Code provides an access control classification system. There are eight separate categories. The State Highway Access Category Assignment Schedule ("the Schedule") assigns to each state highway segment a category pursuant to the requirements of Access Code subsection 2.2 and Section Three. This assignment adoption is by the Commission. The Commission is promulgating rules in response to requests received from local governments and CDOT related to the Schedule.

1.3 Category FR - Frontage Roads

Section Two of the Schedule contains the category assignments for all sections of highways specifically assigned by the Commission. By this Schedule, all state highway frontage roads (includes service roads) are assigned category FR, except for those segments specifically listed in Section Two as requested by the local authority in accordance with Access Code subsection 3.13(1).

1.4 How To Read Section Two

(A) The following explanations are given to clarify the column headings in Section Two. They are abbreviated to conserve space.

(B) "Highway" means the state highway number for that line of data. The highway number appears first, followed by a letter of the alphabet. The letter designates particular sections of the highway for administrative and record tracking purposes.

(C) "Beg_MP" means the beginning milepoint. The number is the beginning location of a specific access category segment. Distances from a mile marker sign or known milepoint location to an access location are always measured from the lower mile marker or known milepoint location, in the direction towards the higher mile marker.

(D) "End_MP" means the ending milepoint. The number is the ending location of a specific access category segment.

(E) "CO" means the county in which the segment is located. The counties are numbered. The table below provides the cross-reference between the number and the county name.

(F) "CAT" means the assigned access category. To determine what the Category means, refer to the State Highway Access Code, Section 3. Where an asterisk (*) appears next to the category letters, the category was not considered for revision at the June 17, 1999 rule-making hearing. The category shown was the category effective on August 31, 1998.

(G) "Physical Description of the Category Segment" means the physical landmarks at the beginning and ending boundaries of a category segment.

1.5 Colorado county codes for the "CO" data column in Section Two

001	Adams	031	Denver	063	Kit Carson	095	Phillips
003	Alamosa	033	Dolores	065	Lake	097	Pitkin
005	Arapahoe	035	Douglas	067	La Plata	099	Prowers
007	Archuleta	037	Eagle	069	Larimer	101	Pueblo
009	Baca	039	Elbert	071	Las Animas	103	Rio Blanco
011	Bent	041	El Paso	073	Lincoln	105	Rio Grande
013	Boulder	043	Fremont	075	Logan	107	Routt
014	Broomfield	045	Garfield	077	Mesa	109	Saguache
015	Chaffee	047	Gilpin	079	Mineral	111	San Juan
017	Cheyenne	049	Grand	081	Moffat	113	San Miguel
019	Clear Creek	051	Gunnison	083	Montezuma	115	Sedgwick
021	Conejos	053	Hinsdale	085	Montrose	117	Summit
023	Costilla	055	Huerfano	087	Morgan	119	Teller
025	Crowley	057	Jackson	089	Otero	121	Washington
027	Custer	059	Jefferson	091	Ouray	123	Weld
029	Delta	061	Kiowa	093	Park	125	Yuma

1.6 Revisions

(A) The Schedule will be revised from time to time in accordance with Access Code subsection 2.2 . The State Highway System is modified from time to time, including new additions, abandonments, and administrative changes in accordance with the duties and powers of the Department and the Commission. This may cause some confusion in reading the Schedule at certain highway locations where these administrative changes have occurred. Contact the nearest Department Region office for further information or for any needed clarification.

1.7 Overview of the Access Category Classification Nomenclature

Table of access categories, with approximate descriptions

F-W Interstate System, Freeway Facilities

E-XExpressway, Major Bypass

Rural	Non-Rural
R-A Regional Highway	NR-A Regional Highway
R-B Rural Highway	NR-B Arterial
NR-C Arterial.
F-R Frontage Roads (both urban and rural)	F-R Frontage Roads (both urban and rural)

Notes

2 CCR 601-1A-1

46 CR 10, May 25, 2023, effective 6/14/2023