custom solution across ohio - vaisala€¦ · custom solution rwis grid across ohio a network of...
TRANSCRIPT
Mack Corbin Jr. / Vice President / M.H. Corbin, Inc. / Plain City, OH, USABrent Cobb / Territory Sales Manager / Vaisala / Durham, NC, USA
Custom Solution RWIS Grid
across Ohio
A network of 173
RWIS stations across
the state of Ohio
help make intelligent
operational decisions
for winter road
maintenance.
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HAMILTON
CLERMONT
BROWN
BUTLER
PREBLE
MONTGOMERY
DARKE
WARREN
GREENE
MIAMI
ADAMS
HIGHLAND
SCIOTO
PIKE
ROSS
CLINTON
FAYETTE
CLARK
MADISON
PICKAWAY
FRANKLIN
DELAWARE
SHELBY
MERCER
AUGLAIZE
CHAMPAIGN
ALLEN
VAN WERT
PAULDING
WILLIAMS
DEFIANCE
PUTNAM
HENRY
FULTON
LOGAN
UNION
HARDIN
MARION
WYANDOT CRAWFORD
MORROW
WOOD
HANCOCK
SANDUSKY
LUCAS
SENECA
OTTAWA
JACKSON
GALLIA
VINTON
HOCKING
MEIGS
ATHENS
FAIRFIELD
LICKING
PERRY
MUSKINGUM
MORGAN
NOBLE
WASHINGTON
GUERNSEY
MONROE
BELMONT
KNOX
RICHLAND
COSHOCTON
HOLMES
WAYNE
ASHLAND
HURON
ERIE
LAWRENCE
MEDINA
LORAIN
TUSCARAWAS
STARK
HARRISON
JEFFERSON
CARROLL
COLUMBIANA
SUMMIT
PORTAGE
CUYAHOGA
GEAUGA
MAHONING
LAKE
TRUMBULL
ASHTABULA
CINCINNATI
MIDDLETOWN
DAYTON
SPRINGFIELD
COLUMBUS
LIMA
YOUNGSTOWN
TOLEDO
HUNTINGTON-ASHLAND-IRONTON
NEWARK - HEATH
BELPRE-PARKERSBURG
MANSFIELD
AKRON
CLEVELAND
BRIDGEPORT-WHEELING
STEUBENVILLE
CANTON
WILMINGTON
OXFORD
EATON
UNION CITY
GREENVILLE
SIDNEY
NEW CARLISLE
PIQUA
URBANA
HILLSBORO
GREENFIELD
PORTSMOUTH
JACKSON
CHILLICOTHE
WELLSTON
WASHINGTONCOURT HOUSE
LONDON
CHOCTAW LAKE
MARYSVILLE
CIRCLEVILLE
ASHVILLESOUTH BLOOMFIELD
CELINA
NEW BREMEN
ST. MARYS
WAPAKONETA
EAST PALESTINE
VAN WERT
DELPHOS
BELLEFONTAINE
RUSSELLS POINT
ADA
BRYAN
DEFIANCE
NAPOLEON
BOWLINGGREEN
WAUSEON
MAYSVILLE
KENTON MARION
FINDLAY
UPPERSANDUSKY
DELAWARE
BUCYRUS
GALION
WILLARD
FOSTORIA
TIFFIN
FREMONT
BELLEVUE
CLYDE
NORWALK
PORT CLINTON
GALLIPOLIS
MIDDLEPORT
ATHENS
LANCASTER
LOGAN
ZANESVILLE
CROOKSVILLE
COSHOCTON
CAMBRIDGE
MARIETTA
ST MARYS WVA
ASHTABULA
NEW MARTINSVILLE
MOUNT VERNON
SHELBY
ASHLAND
NEWPHILADELPHIA
WOOSTER
ORRVILLE
RITTMAN
SANDUSKY
LORAIN - ELYRIA
MEDINA
ALLIANCE
EAST LIVERPOOL
LISBON
SALEM
COLUMBIANA
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Ohio RWIS Locations
Legend
ODOT
City of Cincinnati
Delaware County Engineer
Site # District Location143 2 SR 2 SLM 31.8 Lucas144 2 I-75 @ Eagleville Rd.145 2 I-75 SLM 18.4 Wood146 2 I-75 @ I-475 Wood147 2 I-75 @ I-80 Wood 148 2 US 6 @ US 23149 2 US 20 @ Lemoyne Rd.150 2 I-280 @ Libbey Rd.151 2 SR 2 @ Portage River Bridge152 2 SR 2 SLM 28.5 Bay Bridge Ottawa153 2 US 20 @ Sugar Creek154 2 US 6 @ Sandusky River Bridge155 2 US 6 @ Pickeral Creek156 2 US 20 @ Hayward Rd. SLM 31.0 Sandusky157 2 US 23 SLM 5.5 Seneca158 2 SR 12 SLM 7.0 Seneca159 2 US 224 @ SR 53 Seneca160 2 SR 4 SLM 2.4 Seneca161 12 I-90 @ SR 252162 12 I-90 @ Abbey Ave.163 12 I-90 @ E. 140th St.164 12 I-271 @ I-90165 12 I-480 @ SR 10166 12 I-71 @ Snow Rd.167 12 I-77 @ I-480168 12 I-480 North @ Miles Rd.169 12 I-271 @ US 322170 12 I-71 @ Drake Rd.171 12 I-77 @ SR 82172 12 US 422 @ Chagrin River Rd.173 12 US 422 @ SR 44174 12 SR 528 @ SR 87175 12 SR 44 @ Mentor Rd.176 12 SR 528 @ SR 166177 12 I-90 @ Hermitage Rd.178 12 I-90 @ Paine Rd.179 12 US 20 @ Parmly Rd.180 6 I-270 @ US 33181 Home Rd. @ SR 257182 6 I-71 @ SR 665 Grove City Outpost184 SR 562 (Norwood Lateral) @ Reading Rd.185 River Rd. (US 50) @ Kibby Lane
Site # District Location99 3 US 30 @ Dalton Lake
100 4 SR 225 @ Berlin Reservoir101 4 SR 45 @ Rock Creek 102 4 SR 7 @ SR 167 East103 5 US 33 @ Pickerington Rd.104 5 SR 3 @ Knox/Ashland Line105 7 I-70/I-75106 11 SR 39 @ Sugar Creek107 11 US 250 @ Ulrichsville108 11 SR 183 @ Minerva109 11 SR 22 @ SR 151110 11 SR 7 @ SR 213111 5 I-70 MM 114112 8 SR 27 SLM 21 Butler113 8 I-275 @ US 52114 6 I-71 @ US 36115 6 I-71 @ Shrock Rd.116 6 I-70 West @ I-270117 6 I-70 @ SR 29118 6 I-70/I-71/SR 315119 6 I-71 South @ I-270120 6 US 33 @ Hamilton Rd.121 6 I-670 over Airport Connector122 4 Medina Line Rd. over I-271123 4 Steels Corner Rd. @ Mud Creek124 4 Old Mill Rd. over I-480125 4 Ridgewood Rd. over SR 21126 4 Killian Rd. over I-77127 2 US 6 Williams County128 2 US 20 SLM 1.5 Williams129 2 US 20 SLM 11.5 Williams130 2 US 20 SLM 2.5 Fulton131 2 US 20 SLM 9.5 Fulton132 2 SR 64 SLM 6.0 Fulton133 2 US 6 SLM 0.5 Henry134 2 SR 108 SLM 0.5 Henry135 2 US 6 @ Maumee River136 2 SR 65 South Henry County137 2 SR 64 SLM 7.5 Lucas138 2 US 24 Near Grand Rapids139 2 I-475 @ I-80 Lucas140 2 I-475 @ US 23 Split141 2 I-75 SLM 4.9 @ I-475 Split Lucas142 2 I-280 @ Veteran Glass City Skyway
Site # District Location53 7 I-70 @ I-67554 7 I-70 MM 6255 5 I-70 MM 14256 5 I-70 MM 16957 5 I-70 MM 19858 11 I-470 MM 659 8 I-71 MM 3460 6 I-71 MM 6061 6 I-71 MM 7562 6 Cemetary Rd. over I-27063 6 I-71 MM 144.164 3 I-71 MM 15865 3 I-71 MM 17466 3 I-71 MM 195.667 3 I-71 MM 20968 4 I-271 @ I-7769 8 I-275 MM 2170 8 I-275 @ Hamilton/Clermont Line71 8 I-675 @ Montgomery/Greene Line72 8 I-75 MM 18 @ Hamilton/Butler Line73 8 I-75 MM 2974 7 I-75 MM 4075 7 I-75 MM 6576 7 I-75 MM 8477 7 I-75 MM 10578 1 I-75 MM 11979 1 I-75 MM 14180 10 I-77 MM 081 10 I-77 MM 1682 5 I-77 MM 3683 5 I-77 MM 5984 4 I-77 MM 9385 3 SR 2 @ Huron River86 3 I-90 @ SR 5787 4 I-90 @ Ashtabula/Lake Line88 4 I-90 @ SR 1189 4 I-90 @ PA Line90 4 I-80 @ PA Line91 4 I-76 @ Mahoning/Portage Line92 4 I-76 @ Portage/Summit Line94 4 SR 11 @ Ashtabula/Trumbull Line95 4 SR 11 @ Mahoning/Columbiana Line97 6 SR 315 @ I-27098 6 I-270 SB Ramp to SR 161 EB
Site # District Location1 1 SR 127 @ SR 2492 1 Hardin County Garage3 1 US 24 @ Indiana Line4 1 US 224 @ SR 1905 1 US 30 @ SR 49 North6 1 US 23 SLM 11.2 Wyandot7 3 US 30 Bypass @ SR 48 3 Huron County Garage9 4 I-77 MM 109 @ Belden Village10 4 Trumbull County Garage11 5 Coshocton County Garage12 5 US 33 @ SR 79313 5 Knox County Garage14 5 Perry County Garage15 6 Fayette County Garage16 6 Pickaway County Garage17 6 US 23 @ E. Fairground Rd. Overpass18 6 US 33 @ SR 73919 7 US 68 SLM 1.4 Champaign20 7 SR 502 SLM 0.5 Darke21 7 US 33 @ SR 54022 7 SR 29 SLM 0.8 Mercer23 9 Adams County Garage24 9 Brown County Garage25 9 Highland County Garage26 9 SR 32 SLM 14.5 Jackson27 9 US 52 @ Ice Creek28 9 US 23 SLM 6.5 Pike29 9 US 35 SLM 14.8 Ross30 9 US 23 SLM 9.2 Scioto31 10 Athens County Garage32 10 Gallia County Garage33 10 Hocking County Garage34 10 Meigs County Garage35 10 Monroe County Garage36 10 Morgan County Garage37 10 Vinton County Garage38 11 Carroll County Garage39 11 Columbiana County Garage40 8 Clinton County Garage41 11 Holmes County Garage42 11 Jefferson County Garage51 8 I-70 MM 152 8 I-70 MM 18 @ Motgomery/Preble Line
The Ohio Department of Transporta-tion’s (ODOT) Road Weather Infor-mation System (RWIS) grew from a handful of RWIS stations around one city in the early 1990s to 66 stations in three cities by 2002. But even after proving its effectiveness for better road winter maintenance at lower costs by shifting to anti-icing operations that prevent or delay ice formation instead of traditional de-icing operations that remove ice, the RWIS was still concentrated in three of Ohio’s urban areas. The rest of the state, including most rural areas, remained underserved.
“RWIS contributed to intelligent operational decisions for anti-icing in the Columbus, Cleveland, and Toledo areas only,” said Abner Johnson, ODOT RWIS Coordinator.
To extend the system to rural areas, ODOT faced four significant barriers, three having to do with cost. First was the cost of the sta-tions themselves; RWIS stations can be expensive purchases especially if deployed in large quantities. Second was the high cost of supplying con-ventional power along the interstates in some rural areas. Third, using tra-ditional landline phone carriers with long distance service can become very expensive for some sites.
Before a statewide RWIS deploy-ment could take place, ODOT needed to address these costs by finding a solutions-oriented supplier willing to work with them on each of these barriers while still meeting ODOT’s specifications.
Expansion to Rural Ohio
The need for expansion was sup-ported by a comprehensive study, “Evaluation of ODOT Roadway/Weather Sensor Systems for Snow and Ice Removal Operations”, by Ohio University. The study estimated
that by enabling preventative anti-icing techniques instead of reactive de-icing techniques, benefits outweighed costs by factor of 5 to 1, primarily from reductions in labor and materials required for winter maintenance.
Anecdotal evidence on the ben-efits of improved safety by reducing accidents made an even stronger case for expanding RWIS. The report recommended expansion with an implementation plan.
Breakthroughs to move forward came in technology, economics, and a supplier willing to innovate and focus on the customer’s application. Commercially available cellular tech-nology and solar power could reduce infrastructure costs making remote stations feasible. As opportunities to reduce costs looked bright, the need to achieve a more cost-effective solu-tion was pushed forward by truck snow plow costs that significantly increased along with increasing salt prices and ongoing budget cuts.
ODOT identified pavement sensors as the single RWIS compo-nent that could provide the most added value. Pavement sensors are critical since they provide site-specific, surface-level information not provided in standard weather reports
In the beginning, the RWIS was concen-trated around Columbus, Cleveland and Toledo while most rural areas remained underserved.
Ohio’s Road Weather Information System (RWIS) grew from a handful of stations around one city to a network of 173 RWIS stations across the state. Map courtesy of the Ohio Department of Transportation.
184/2010 21
from government or commercial weather forecasting services.
Customizing the Right Solution
M.H. Corbin, a supplier that special-izes in integrated traffic system and highway safety products, won the bid to expand the system by 100 stations. M.H. Corbin partnered with Vaisala (then NuMetrics and SSI, divi-sions of QTT) to provide a custom solution to meet ODOT’s budget and operational requirements.
The Permanent Wireless Traffic Analyzer was selected to monitor road surface temperature, wet/dry conditions, vehicle count, speed, and vehicle classification.
“The sensor didn’t require trenching or re-trenching during paving or repair work, which reduced ODOT’s road construction and maintenance costs and added valu-able traffic data,“ said Johnson. The self-contained sensor collects data without any external sensors, loops or tubes and uses vehicle magnetic imaging technology to detect vehicle count, speed and classification.
Next, the suppliers engineered a custom solution by adapting the Remote Processing Units (RPUs) to cellular technology and lowering power consumption to 230 watts so each station could be operated entirely by solar panels, eliminating the need for fixed wire communica-tions and power utility service to the stations. This reduced installation and operational cost barriers for the stations.
The Wireless Pavement sensor, wireless communications, and solar power meant the stations could be self-contained and lower their total operational cost. ODOT was also able to reduce station cost by focusing sensing accuracy on two param-eters, precipitation on the ground and pavement temperature, and was willing to compromise sensor accuracy on the other parameters. By customizing the system to meet their operational requirements and
budget, ODOT was able to expand RWIS statewide on an approximately 30-mile grid.
Implementing the New Standard Statewide
In 2005, M.H. Corbin also won the bid to retrofit the original 66 stations to bring all stations to the new standard with wireless pavement sensors, wireless RPUs, and solar panels, along with wind turbines as a supple-mental power source, having deter-mined that Ohio has inconsistent and inefficient solar energy during the winter months.
Along with the technology, train-ing of maintenance organizations across the state was important to successful implementation.
“The key to training is teaching folks how to turn data into informa-tion. ODOT’s winter maintenance goal is to provide a safe and passable highway system. Helping front line managers understand how RWIS could help them make intelligent
decisions on resource management and scheduling, allowed ODOT to overcome the fourth significant challenge to a statewide system: user resistance,“ Abner Johnson said.
Data Valuable to Multiple Users
The RWIS data is shared and moni-tored by maintenance operations in all of Ohio’s 88 counties. Typical winter storm conditions can change in as little as 30 miles and move at 30 to 35 miles per hour. Maintenance garages across the state have access to RWIS’ near real-time conditions, as well as ODOT contracted weather forecasts and reports, alerts, and blogs through its internally developed buckeyetraf-fic.org website. These tools help managers monitor storm conditions and plan their anti-icing operations accordingly.
ODOT’s RWIS has gained support from other government agencies and departments and has increased its value as a year-round resource. Resurfacing and road repair opera-tions check pavement temperatures as part of their chip sealing, mill and fill and overlay efforts. Wind direc-tion and wind speed are important factors in maintenance operations such as herbicidal spraying, bridge painting and highway striping.
The Ohio Emergency Management Agency includes RWIS in response planning for severe weather such as tornados and blizzards and planning related to Ohio’s two nuclear power plants. ODOT’s Office of Innovation uses vehicle counts from RWIS sta-tions as a supplement to their array of automated traffic recorders for traffic data required for federal funding.
The system has also created a valuable link between ODOT and partnering governmental agencies. By lowering costs, being innovative, and working for support and coop-eration, ODOT now has a snow and ice optimization process that helps it efficiently reach its goal of safe and passable roads statewide.
Vaisala Permanent Traffic Analyzers are installed with each RWIS wireless station. Photo courtesy of the Ohio Department of Transportation.
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