ACEC ConferenceMarch 5, 2012

Trudy Elsner P.E., Metro Maintenance, Engineering ServicesSheila Johnson P.E., Metro Maintenance, Traffic Services

A flexible plan is essential.A flexible plan is essential.

Snow & IceSnow & Ice

Provide 10’ or more for snow storage on roadways and bridges. Keep noise walls more than 10’ from roadway. Balance distance from frontage roads.

Always look for possible snow storage locations

Consider drainage pattern for area of snowmelt/re-freeze

Design mountable curb at snow storage locations.

Keep structures (hand holes, signs, etc.) as far from driving surface as possible to help with our winging operations-10’ from shoulder PI.

Improve the road surface –

less patching

Repair erosion – improve drainage

Bring assets up to new standards

Provide infrastructure improvements that reduce the near-term maintenance efforts

Lane Miles increasing overall maintenance – snow removal, striping, sweeping, patching, etc.

Square Footage to structures increasing inspection, preventive and reactive maintenance costs

Non-standard items such as bridge rail or fencing

Bridge at 35W and County Rd E2◦ Minimize structure size vs. Maximize clear zone

t

Hastings Bridge Project◦ Benefit from full evaluation of shoulder width

Crosstown Improvements 62 and 35W◦Provide access for future maintenance of all drainage infrastructure

Cayuga Project◦Snow Storage Considerations

Minimal/No shoulder forces maintenance into

traffic lanes

Metro District restripes 2,300 line miles annually with latex and HPS4

Consider pavement joint location and effect on pavement markings

Groove edge lines into concrete pavement

Fog seal bituminous shoulder prior to grooving edge lines and rumbles prior to striping

Four crews dedicated to Metro District have refreshed up to 150,000 sq. ft. annually

Prefer bike lanes over sharrows because the markings are removed from the wheel path

Over 100,000 signs on trunk highways in Metro District

Sign densities on Metro’s trunk highways are 34 to 133 signs/mile

Repair over 7,000 signs annually Install gore area signs and other frequently hit locations on slip bases Consider installing signs on retaining walls to minimize obstacles for snow and ice removal

Addressed 362 tags over the past year Standard practice is to paint over the graffiti Paint colors are matched to original construction

specifications but structure color changes due to wear and exposure

Exposed aggregate or stone facing require soda blasting, chemical or power washing Consider anti-graffiti film for signs in higher risk locations

Start with the end in mind.

Look for ways to minimize the impact to traffic.

Evaluate lifecycle costs, the lowest initial cost may not be the best value.

Be open to alternatives, they may prove beneficial in more than one way.

Engineering Services-Trudy Elsner 651-234-7924

Trudy.elsner@state.mn.us

Traffic Services-Sheila Johnson 651-234-7935

Sheila.m.johnson@state.mn.us