acec conference march 5, 2012 trudy elsner p.e., metro maintenance, engineering services sheila...
TRANSCRIPT
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
Traffic Services-Sheila Johnson 651-234-7935