Appendix E Access GuidlinesAppendix E: Access Guidelines
Mn/DOT Access Management Manual
Figure 3.2 — Summary of Recommended Street Spacing for Non-IRCs
January 2, 2008 Page 5
Area or
Typical
Public Street Spacing
Primary
Secondary
Category
Facility
Functional
Signal Spacing
Type
Class
Full -Movement
Intersection
Intersection
4 Principal Arterials in the Twin Cities Metropolitan Area
and Primary Regional Trade Centers (Non-IRCs)
4AF
Non -Interstate
Interchange Access Only
Interim
Freewa
(see Section 3.2.7 for interim spacing)
4A
Rural
1 mile
1/2 mile
See Section 3.2.5
Principal
Arterials
Urban/
46
Urbanizing
1/2 mile
1/4 mile
1/2 mile
4C
Urban Core
300-660 feet, dependent upon block length
1/4 mile
5 Minor Arterials
5A
Rural
Minor Arterials
1/2 mile
1/4 mile
See Section 3.2.5
5113
Urban/
1/4 mile
1/8 mile
1/4 mile
Urbanizing
5C
Urban Core
300-660 feet, dependent upon block length
1/4 mile
6 Collectors
6A
Rural
Collectors
1/2 mile
1/4 mile
See Section 3.2.5
6113
Urban/
1/8 mile
Not Applicable
1/4 mile
Urbanizing
6C
Urban Core
300-660 feet, dependent upon block length
1/8 mile
7 Specific Area Access Management Plans
7
All
All
By adopted plan
January 2, 2008 Page 5
Table 4-7
Access Spacing Guidelines c1�
Washington County
F_ Functional Classification of County Highway
Minor Arteria 1(2)
Principal
> 7,500 < 7,500
Type of Access
Arterial
ADT ADT
Collector
Local
Private residential driveways
No direct access
No direct
variable 3
variable 3
variable
access
Commercial driveways or
No direct access
No direct
1/8 mile
1/8 mile
variiable 3
non -continuous commercial
access
streets
Non -continuous residential
No direct access
1/8 mile
1/8 mile
1/8 mile
variable s
streets (4)
with no
median
opening
Continuous local streets and
% mile
% mile
% mile
1/8 mile
1/8 mile
collector streets
Minor arterials
% mile
% mile
% mile
%2 mile
%2 mile
(1) Distances shown are minimums. The county reserves the right to increase the minimum distances based on other criteria.
The type of traffic control, turn lanes and bypass lanes required are determined based upon the projected traffic volumes on
the type of access requested.
(2) ADT is the 20 -year forecast for average daily traffic.
(3) Spacing is based on criteria such as sight distance, speed, traffic volumes, etc.
(4) Cul de sac or short -length streets (less than %2 mile) that do not cross a county highway.