045-13 Wyo. Code R. § 13-13
(a) Locations of accesses shall be selected to provide maximum safety for highway traffic and for users of the access and shall meet an adequate highway stopping sight distance. All parts of any access, including the radii, shall have a minimum side clearance of 12.5 feet from the abutting property line. Accesses shall be spaced according to the highway's functional classification and whether the location is urban or rural. Tables 1 and 2 indicate access spacing for rural highways. Access spacing is measured from access center to access center. Access Type Field Residential Commercial Major Field 330 330 660 1,320* Residential 330 660 1,320* 1,320* Commercial 660 1,320* 2,640* 2,640* Major 1,320* 1,320* 2,640* 2,640*
Table 1. Rural Arterial Access Spacing. (Minimum separation distances in feet per side) *If 2 state highways intersect, then an access may be allowed for distances less than those shown in Table 1 if the distance from the intersection to an access is at least 660 feet.
Read this table by selecting the type of access in the column on the left side. The minimum separation distance from any other access across the top row is where the column and row intersect. For example, the minimum separation distance between a field access and either another field or residential access is 330 feet. The minimum separation distance between a field and a commercial access is 660 feet. The minimum separation distance between a field and major access is 1,320 feet. Read following Table 2 in the same manner.
- (A) If a rural principal arterial is a non-interstate, divided multilane highway that allows at-grade intersections (where all roadways join or cross at the same level), then the field and private residential accesses shall be right-in and right-out only.
- (B) Major accesses shall be allowed to use a median crossover if the median is wide enough to accommodate the design vehicle.
- (C) Auxiliary left-turn and right-turn deceleration and storage lanes shall be constructed on the main highway to standards WYDOT establishes at major access locations.
- (ii) The following shall apply to access spacing on rural major collectors, minor collectors, and local roads:
Access Type
Field
Residential
Commercial
Major
Field
220
220
330
660
Residential
220
440
660
660
Commercial
330
660
1,320*
1,320*
Major
660
660
1,320*
1,320*
Table 2. Rural Major Collector, Rural Minor Collector, and Rural Local Road Access Spacing. (Minimum separation distances in feet per side)
*If 2 state highways intersect, then an access may be allowed for distances less than those shown in Table 2 if the distance from the intersection to an access is at least 660 feet. See Table 1 for instructions on reading this table.
- (iii) Access spacing shall be as follows for urban arterials and collectors:
- (A) In 30 miles per hour or lower speed limit zones, no accesses shall exist except public streets (side roads), and direct access to abutting property shall be from these streets. Public streets shall be spaced no more closely than 330 feet and spaced consistently. Access density and spacing is shown in Table 3.
- (B) In the 35 to 45 miles per hour speed limit zones, inclusive, there shall be no more than one field, residential, or commercial access per 330 feet of frontage. Public streets shall be spaced no more closely than 660 feet and spaced consistently. Spacing from any access type to any other access type shall be no more closely than 330 feet. If an access is requested between public streets or more than one access is requested on an individual property and the spacing requirements of this subparagraph are met, a Traffic Impact Study shall be required justifying the additional access(es). Access density and spacing is shown in Table 3.
- (C) In 50 to 55 miles per hour speed limit zones, inclusive, no more than one residential or commercial access per 660 feet of frontage. Again, it is preferred that direct access to abutting land be done through side streets. Public streets should be spaced no closer than 1,320 feet. Spacing from any access type to any other access type (other than field to residential or field to field) shall be no closer than 660 feet. If more than one access is requested on an individual property and the aforementioned spacing requirements are met, a Traffic Impact Study (TIS) shall be required justifying the additional access(es). Access density and spacing is shown in Table 3.
Access Type
Access Type
Speed Range (mph)
Field
Residential
Commercial
Major
=30
330
330
330
330
Field
35-45
330
330
330
330
50-55
330
330
660
660
=30
330
330
330
330
Residential
35-45
330
330
330
330
50-55
330
660
660
660
=30
330
330
330
330
Commercial
35-45
330
330
660*
660
50-55
660
660
1,320*
1,320**
=30
330
330
330
330
Major
35-45
330
330
660*
660
50-55
660
660
1,320*
1,320**
Table 3. Urban principal arterials, Urban minor arterials, and Urban collectors.
(Minimum separation distances in feet per side)
*If a two-way left-turn lane is present, the spacing may be reduced by one-half.
**If two State highways intersect, then an access may be allowed less than the above distances,but the distance from the intersection to an access shall be a minimum of 660 feet.
See Table 1 for instructions on reading this table.
- (D) In urban areas, for cities of less than 5,000 population, with 35 miles per hour and lower speeds and average daily traffic volumes less than or equal to 3,000 vehicles per day, the spacing may be reduced, from any access type to any other access type, down to 75 feet.
- (iv) Urban local roads shall be spaced no more closely than 330 feet and spaced consistently. There shall be no more than one access per 75 feet of frontage, and the distance between any access type shall be at least 75 feet.
- (v) Access spacing shall be as follows for Fringe Urban Areas:
- (A) Access density and spacing for rural arterials in the fringe urban area shall be the same as for the urban areas ( see Table 3).
- (B) In 55 miles per hour or lower speed zones, access density and spacing for rural collectors and rural local roads in the fringe urban area is shown in Table 4.
Access Type
Access Type
Speed Range (mph)
Field
Residential
Commercial
Major
=30
220
220
330
330
Field
35-45
220
220
330
330
50-55
220
220
330
660
=30
220
330
330
330
Residential
35-45
220
330
330
330
50-55
220
440
660
660
=30
220
330
330
330
Commercial
35-45
330
330
660*
660
50-55
330
440
1,320*
1,320**
=30
220
330
330
330
Major
35-45
330
330
660*
660
50-55
660
660
1,320*
1,320**
Table 4. Rural Major Collector, Rural Minor Collector, and Rural Local Road Access Spacing for fringe urban areas.
*If a two-way left-turn lane is present, the spacing may be reduced by one-half.
**If two State highways intersect, then an access may be allowed less than the above distances, but the distance from the intersection to an access shall be a minimum of 660 feet.
See Table 1 for instructions on reading this table.
(b) At interchanges, accesses shall be located at least 660 feet from any ramp termini.
(c) At any intersection of a state highway with another highway, road, street, or alley, where additional right-of-way has been procured for improved sight distance, no access shall be permitted on or across the frontage. At any other intersection, accesses shall be prohibited for a sufficient distance from the intersection to preserve the normal and safe movement of traffic through it.
045-13 Wyo. Code R. § 13-13