2019 Design Standards Amendments

2. The additional driveway is warranted by a traffic study. 3. Concurrence by the Jurisdictional Engineer. Driveway access points should be coordinated to minimize turning conflicts. C. Local Roadway The minimum distance between the centerlines of roadway access points is 125-feet. A single driveway access shall be allowed for each lot abutting a local roadway. One additional driveway access may be permitted if the lot has frontage length greater than150-feet. Concurrence of the Jurisdictional Engineer s required. D. Industrial Roadway The minimum distance between the centerlines of roadway access points is 125-feet. A single driveway access shall be allowed for each lot abutting an industrial roadway. Additional driveway access point may be permitted based on projected traffic and concurrence of the Jurisdictional Engineer. 5L-4 A Add the following paragraphs to 5L-4 A: All entrances in urban settings should be paved to prevent aggregate from washing onto the pavement, curb, and gutters. If the existing drive is not paved, pave the first 10 feet from the back of curb or to the edge of the existing sidewalk. All entrances should be constructed so as not to impair drainage within the highway right-of-way nor alter the stability of the highway subgrade and at the same time not impair or materially alter drainage of the adjacent areas. All culverts, catch basins, drainage channels, and other drainage structures required under driveways as the result of property being developed should be installed in accordance with current standards and specifications. 5L-4.H Add the following paragraphs as 5L-4.H: 5L-4.H. Other Jurisdictional Requirements 1. Approvals and Permits A. An access permit must be obtained before driveway construction or reconstruction work is done within the street right-of-way not associated with the construction of a new house or business for which a building permit has been obtained. However, the standards set forth in this document apply to all driveway construction. A sketch with dimensions shall be submitted showing the driveway in relation to intersections, side lot lines and other driveways. B. A permit must be obtained from the Iowa Department of Transportation before placing or modifying a driveway within any state highway right-of-way. C. Contractor must provide a Certificate of Insurance identifying the City as an “Additional Insured” party for the duration of the construction activity. 2. Traffic Control A. The contractor doing the work is responsible for all traffic control and work site safety. If construction activities extend onto the street right-of-way, traffic control shall meet the standards for Work Zone Traffic Control defined in the current edition of the “Manual on Uniform Traffic Control Devices.” Traffic control plans may be required. B. The contractor shall provide adequate barricades and/or fencing to protect pedestrians continuously from the start of construction to the completion of work. 3. Driveway Material, Thickness and Finish A. In Residential Zoning the driveway slab extending from the street to private property shall be constructed of Portland Cement Concrete conforming to the specifications of the Iowa Department of Transportation C-3 or M-3 mixes. The concrete driveway slab shall be a minimum of 6-inches thick. 12