10/04/2006 Env Bd Packet - Laserfiche WebLink

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• • • Environmental Assessment Worksheet Nature's Refuge Conservation Development Lino Lakes, Anoka County, Minnesota Draft Document — September 25, 2006 a) Is the proposed development access plan feasible and will it provide adequate traffic operations? Page 18 b) Would adequate traffic operations be provided at the following intersections upon full completion of the proposed development? o CSAH 14 /CSAH 23 o CSAH 14 /4th Avenue North o CSAH 23/Pine Street o CSAH 14 /development access o Pine Street/development access To effectively address the traffic questions above, traffic forecasts were completed for the 2011 analysis year, which is one year after expected full completion of the proposed project. Capacity analyses were completed for the subject intersections under 2006 Existing, 2011 No- Build, and 2011 Build traffic scenarios. Based on the analysis presented in the traffic study, the following basic conclusions were established: • Upon full completion of the Nature's Refuge residential development, adequate traffic operations will be provided at the proposed development access locations and the following studied intersections: o CSAH 14 /4th Avenue North o CSAH 23/Pine Street o CSAH 14 /development access (if full access to project) o Pine Street/development access • Analysis indicates that the CSAH 14 /CSAH 23 intersection is currently approaching capacity and will experience excessive delays under the 2011 No -Build traffic volumes. These delays will increase upon the addition of the proposed development traffic. As described in the report, the peak hour volume signal warrant is satisfied during the AM and PM peak hours for all scenarios. Under traffic signal operation and existing geometry, the intersection will operate at LOS C or better, though some movements at the intersection would operate at LOS D. The feasibility of installing a signal should be investigated further through the completion of a full signal justification report. • The location of a new development access to CSAH 14 does not satisfy the County's current spacing requirements for a full- movement intersection. However, it does satisfy spacing requirements for the right - in/right -out operation. The option of combining it with the western school access would reduce two access points into one full access intersection. A cooperative effort between the County, City, school board, and developer is needed for this option. This will include what improvements are needed to CSAH 14, including turn lanes. • The proposed development will have the following impacts on the overall regional transportation system: • A small increase in traffic volumes on the overall system. Volume generated by this development is distributed in multiple directions and therefore will result in modest increase in any one particular area. This small increase in traffic volumes will have a small effect on the level of service at CSAH 14 /CSAH 23, but that intersection will experience unsatisfactory levels of service (LOS E) even without the additional trips generated by the development. • The option of consolidating the new project access onto CSAH 14 with the school access would result in one access (a full access city street) rather than two (the full access school driveway and one new partial access city street). This design would be a better way to pursuit the goals of the City /County CSAH 14 access management study.