Chapter 6 Mobility Standards Appendix 6A Access Management Design Manual Page3 of 3

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1.7 Driveway Location and Design

1. Sight distance at driveway approaches must be located and designed in conformance with appropriate AASHTO, ITE or other applicable standards.
2. The Director of Works may require deceleration or storage lanes where deemed necessary due to traffic volumes, speed limits, or where there may be a safety or operational problem. The design of left-turn and right-turn deceleration/storage lanes shall conform to appropriate agency standards.
3. Due to the potential for vehicular weaving conflicts and crashes, construction of driveways along acceleration or deceleration lanes, left turn storage lanes and tapers is to be avoided, unless no other access to the property is available.

4. Driveways across from median openings should be consolidated wherever feasible, to coordinate access at the median opening.
5. Driveways on undivided roadways should be aligned directly opposite driveways on the opposite side of the road, or offset from each other in accordance with applicable County or State Highway Standards, due to the potential for conflicting left turns or jog maneuvers and resulting safety or operational problems.
6. Driveway width and return radius or flare shall be adequate to serve the volume of traffic and provide for efficient movement of vehicles onto and off of the major thoroughfare. However, the width of driveways shall not be so excessive as to pose safety hazards for pedestrians and bicycles. The Director of Works may require longer radii and/or wider throats where deemed necessary to accommodate trucks.

7. Driveways with more than two lanes should incorporate channelization features. Double-yellow lines may be considered instead of medians where truck off-tracking is a problem.
8. Driveways shall be designed with adequate on-site storage for entering and exiting vehicles to reduce unsafe conflicts with through or on-site traffic and to avoid congestion at the entrance. These guidelines are intended for the principal access to the property and are not intended for minor driveways.

1.8 Redevelopment

Access connections to roadways in place as of the date of adoption of this article that do not conform with the standards herein are considered nonconforming. Properties with nonconforming connections should be brought into compliance with this article as changes to the roadway design allow or when an existing development is changed in any of the following ways:

1. existing structure is replaced by new structure or improvements; or
2. existing structure or parking lot is expanded by 20% or more beyond the size existing at the effective date of this regulation (incremental changes that cumulatively increase the size by 20% fall within the regulated activities of this paragraph); or
3. an existing use is changed to a use for which Chapter 9 of the Land Development Code specifies a higher parking ratio.

1.9 Corridor Access Management Overlay Zones

1. Segments of a roadway corridor may be designated as corridor access management zones for the purpose of applying special access management controls that exceed the requirements and standards in this article. The purpose of this designation is to avoid significant traffic congestion problems, reduce vehicular and pedestrian conflict areas, and to ensure appropriate development within the designated area in accordance with the Jefferson County Comprehensive Plan.
2. The controls in such districts are not intended to be substituted for other general zoning district provisions but can be superimposed over such district provisions and should be considered additional requirements.
3. Corridor access management zones shall be designated and approved in accordance with the public involvement and public hearing requirements of Jefferson County that govern the creation of all land use designations and zoning districts.

1.10 Access to Homes and Subdivisions

1. When a residential subdivision is proposed that abuts an arterial or major collector roadway, it shall be designed to provide lots abutting the roadway with access only from an interior local road or frontage road.
2. Direct Driveway access to individual one and two family dwellings on arterial and collector roadways are prohibited unless the Planning Commission determines that there is no acceptable access alternative.