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Table 10 <br /> UNIT COST ESTIMATES <br /> Bikeway Facility Cost Per Milel <br /> Class III Bike Route: <br /> • signing, minor surface repair $1,000 <br /> • rural road widening (32" shoulder) <br /> Class II Bike Lane: <br /> • signing, striping, minor surface repair $20,000 <br /> • signing, striping, road widening $50,000 <br /> Class I Bike Path: <br /> • rehabilitate or upgrade existing path $50,000 <br /> • construct asphalt path on existing level embankment, $150,000 • <br /> or right of way, includes signing, striping <br /> • construct asphalt path on graded right of way, $230,000 <br /> requires drainage and new sub -base <br /> • construct asphalt path within ungraded corridor, $350,000 <br /> some retaining walls required <br /> Support Facilities: <br /> Signal Loop Detectors $2,500 /intersection <br /> Undercrossing $150,000 - $350,000 <br /> At -Grade Crossing <br /> • signing, striping $5,000 <br /> • signing, striping, signals $65,000 <br /> Landscaping <br /> • irrigated $350,000 - $600,000 /mile <br /> • non - irrigated $150,000 - $300,000 /mile <br /> Bridge (8' wide) $60 - $100 square foot <br /> Fencing $20 linear foot <br /> Railroad Crossing $125,000 <br /> Emergency Cellular Phone (installed) $3,500 <br /> 1 The cost estimates were based on actual costs experienced in various California <br /> communities. They are estimated only; more detailed estimates should be <br /> developed after preliminary engineering. <br /> 2 Contribution for roadway improvement projects (approximately 20 %) of total <br /> cost. <br />