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CENTERVILLE RD (CSAH 21/CSAH 59) AT ASH ST (CR J)/WILKINSON LAKE BLVD PAGE 6 ICE REPORT S.A.P. TBD WSB PROJECT NO. 2988-080 CITY OF LINO LAKES, MN FUTURE CONDITIONS Traffic growth in the area will occur between existing conditions and any given future year due to other development within the region. This background growth must be accounted for and included in future year traffic forecasts. Reviewing the historical traffic counts in the area, traffic has stayed somewhat constant or dropped over the past few years. However, in order to account for some background growth in traffic the MnDOT State Aid traffic growth projection factor of 1.4 over a 20 year period (1.7%/year) was used to project traffic from the 2016 counts to the 2018 and 2038 analysis years. This factor would account for any future land use outline in the City’s Comprehensive Plan. In addition to the regional background traffic, future traffic related to proposed Hawkins Residential development was determined and included with the overall future traffic projections for the build conditions. The estimated trip generation from the proposed development is shown in Table 3. The trip generation used to estimate the proposed site traffic is also based on rates for other similar land uses as documented in the Institute of Transportation Engineers Trip Generation Manual, 9th Edition. The table shows the daily, weekday AM and PM peak hour trip generation for the proposed development. Table 3: Estimated Development Site Trip Generation Planned Use Size Daily AM Peak Hour PM Peak Hour Total In Out Total In Out Single Family 29 units 276 21 5 16 29 18 11 Townhomes 30 units 174 13 2 11 15 10 5 Senior Housing 147 units 506 29 10 19 37 20 17 Total New Trips 956 63 17 46 81 48 33 Source: Institute of Transportation Engineers Trip Generation Manual, 9th Edition Traffic forecasts were prepared by adding the projected annual background traffic growth and the projected non-development traffic growth to the existing 2016 traffic counts to determine the “No-Build” traffic conditions. The proposed development traffic was then added to the no-build traffic conditions to determine the 2018 and 2038 Build traffic conditions. Figures 3 - 6 shows the projected 2018 and 2038 No-Build and Build AM and PM peak hour traffic volumes. MnDOT has also explored a future improvement of adding roundabouts at the Ash Street (CR J) I35E Ramp intersections. Two alternative concepts have been discussed. Figure 7 shows a drawing that accommodates the existing traffic movements only and; Figure 8 shows a drawing that includes an exit ramp from southbound I35E and an entrance ramp to northbound I35E. Although either of these improvements have not been approved, preliminary discussions with MnDOT and the Counties favor the alternative that adds the ramps to and from the north.