Review of Policies Spring Road Restrictions (SRR), and Winter Seasonal Weights (WSW)... MCCC Meeting November 16, 2016

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1 Review of Policies Spring Road Restrictions (SRR), and Winter Seasonal Weights (WSW) MCCC Meeting November 16, 2016

2 Objective and Outline of Today s Presentation Objective: Obtain stakeholder input on the proposed changes to SRR and WSW Policies Outline: Overview of SRR and WSW Review current polices Present proposed changes Provide opportunity for questions Request stakeholder input

3 Seasonal Variation of Truck Axle Weights Manitoba Reduces the allowable axle weights on weak roads during the spring thawing period; and Allows higher than normal axle weights during the winter season Normal Weights (NW) Increased Weights NW Reduced Weights (Weak Roads) Jun Nov. 30 Summer (183 Days) Dec Feb. 28 *Winter (90 Days) *Can be longer than 90 days: - Can start before Dec. 1 - Can extend into March (normal) Mar Pre-Spring (10 days) Mar May 31 **Spring (82 days) ** Max. 56 days within this window: - Can start later than Mar. 11 (normal) - Should end on or before May 31

4 Review of Spring Road Restrictions (SRR) Policy Why does MI impose SRR? Pavements are at their weakest state during the spring thawing period Due to excessive moisture in the base layer(s) and subgrade Surfaced weak pavement structures are susceptible to significant damage The allowable axle weights are reduced from the normal (legal) weights to minimize the damage and save millions of dollars in repair costs

5 Current SRR Policy Manitoba currently has two levels of SRR Has fixed earliest start and latest end dates Earliest start date = March 11 th Latest end date = May 31 st Maximum duration = 56 days Province is divided into two climate zones: north and south

6 Current Climate Zones Zone #1 - means the Province of Manitoba south of the line that includes PTH #77, going easterly to include PR #513 (Gypsumville) and the northern tip of Black Island, following the eastern shore of Lake Winnipeg to the north shore of the Winnipeg River, easterly along the north shore of the Winnipeg River to PR 304 and easterly to the Ontario border. Zone #2 - means the Province of Manitoba north of Zone #1.

7 Current Concerns SRR cannot be started before March 11 th Inconsistent weather patterns, warm weather and thawing in late February and early March can result in significant pavement damage before the start of SRR SRR cannot extend beyond 56 days or May 31 st Slow thawing sometimes requires more than 56 days and beyond May 31 st to adequately recover pavement strength

8 Current Concerns (cont d...) Two climate zones do not sufficiently represent varying weather conditions throughout the province Thompson and northern areas are colder than the southern part within current Zone 2 Southern part of Zone 2 triggers early start and early end of SRR that cause additional damage to pavements in Thompson and northern areas

9 Example of Early Thawing, Slow Recovery and Infrastructure Damage In 2016, the weather based trigger to start SRR was reached on March 7 th in Zone 1 SRR started on March 11 th (earliest start date in current policy) Pavements warranted 66 days for recovery to the desired strength in both zones (i.e. more than 56 days) The estimated cost associated with the reduction in pavement service life due to structural damage for the entire road network is in the order of $25 million (for 2016) Road maintenance cost due to surface break up was estimated at $7.2 million for 2016 alone, in large part due to the current SRR policy limitations

10 Time Warranted for Adequate Strength Recovery (Last 5 Years Data) Duration exceeding 56 days causes additional maintenance costs and reduces pavement service life 66 Warranted SRR Duration, days Climate Zone 1

11 Variation of Warranted Dates in Different Areas 11-Apr Warranted SRR Start Dates (15 Years Average) 2-Jun Warranted SRR End Dates (15 Years Average) 4-Apr 28-Mar 24-Mar 26-Mar 24-Mar 25-Mar 26-Mar 28-Mar 29-Mar 4-Apr 26-May 19-May 12-May 8-May 10-May 7-May 11-May 11-May 13-May 19-May 26-May 21-Mar Winnipeg Brandon Melita Pinawa Dauphin Swan River The Pas Thompson 5-May Winnipeg Brandon Melita Pinawa Dauphin Swan River The Pas Thompson

12 Proposed SRR Policy Changes Redefine the climate zones Revise the earliest start and latest end dates Remove the maximum 56 day duration and allow the duration to be calculated based on sound engineering

13 Proposed SRR Policy Changes: Redefine Climate Zones Zone 1- no change from current zone Zone 2- means the Province of Manitoba north of Zone 1 and south of the line that includes Sherridon Road (Sherridon), going easterly to include PR 393, Wabowden Access Road (Wabowden) and Sipiwesk Lake Access Road, and easterly to the Ontario border Zone 3- means the Province of Manitoba north of Zone 2

14 Proposed Policy Changes: Start & End SRR Revise the allowable earliest start & latest end dates and duration: Policies Zones Earliest SRR Start Latest SRR End SRR Duration Current Zone 1 March 11 May 31 Max. 56 days Zone 2 March 11 May 31 Max. 56 days Zone 1 March 01 May 31 *Variable Proposed Zone 2 March 06 May 31 *Variable Zone 3 March 12 June 10 *Variable *Variable = As required in any given year Note: The average (15 years) warranted SRR duration = 53 days

15 Review of Winter Seasonal Weights (WSW) Policy What is WSW? Increase in allowable gross axle weights and gross vehicle weights when pavements are frozen. It includes: Winter weight premium (WWP): Up to 10% increase in axle weights (except steering and tridem axles) on all highways Winter seasonal Class A1 highways: Specific Class B1 highways are reclassified as Class A1 highways o Allowed Class A1 highway axle weights plus WWP Winter seasonal RTAC routes: Specific Class B1 and Class A1 highways are reclassified as RTAC routes o Allowed RTAC axle weights plus WWP

16 Current WSW Policy Has fixed latest start and earliest end dates Latest start date = December 1 st Earliest end date = Last day of February in the following year Uses the same existing climate zones and weather stations as the SRR program

17 Current Concerns WSW cannot be started later than December 1 st Inconsistent weather patterns and mild/warm weather in late fall can result in- o Slow freezing of pavement layers and subgrade o Insufficient frost depth by December 1 st, and o Insufficient pavement strength gain by December 1 st This will result in pavement damage after starting the WSW on December 1 st WSW cannot be ended before the end of February Inconsistent weather patterns and warm weather in late winter can result in thaw weakening of pavements before end of February This will result in pavement damage before ending the WSW

18 Current Concerns (cont d...) Two climate zones do not sufficiently represent varying weather conditions throughout the province Thompson and northern areas are colder than the southern part within current Zone 2 Southern part of Zone 2 triggers a late start and an early end of WSW that results in a shorter WSW period in Thompson and northern areas

19 Example of Slow Freezing, Early Thawing and Infrastructure Damage In 2015, the weather based trigger to start WSW was reached on December 22 nd in Zone 1 and on December 12 th in Zone 2, but WSW was allowed on December 1 st The estimated cost associated with the reduction in pavements service life due to structural damage for the entire road network is in the range of $1 million (for 2015) In 2010 and 2016, thawing started in mid February, but WSW could not be removed until the end of February

20 Variation of Warranted Dates in Different Areas 11-Dec Warranted WSW Start Dates (14 Years Average) 28-Mar Warranted WSW End Dates (15 Years Average) 4-Dec 27-Nov 4-Dec 2-Dec 4-Dec 4-Dec 3-Dec 30-Nov 28-Nov 21-Nov 21-Mar 14-Mar 10-Mar 20-Nov Winnipeg Brandon 11-Mar Melita 10-Mar Pinawa Dauphin Swan River The Pas Thompson 9-Mar 11-Mar 12-Mar 13-Mar 21-Mar 7-Mar Winnipeg Brandon Melita Pinawa Dauphin Swan River The Pas Thompson

21 Proposed WSW Policy Changes Redefine the climate zones Use the same zones as proposed for SRR Policies Zones Latest WSW Start Earliest WSW End Zone 1 December 01 February 28 or 29 Current Zone 2 December 01 February 28 or 29 Revise the allowable latest start and earliest end dates Proposed years average warranted durations: Zone 1: December 6 th to March 9 th (94 days) Zone 1 December 21 February 20 Zone 2 December 12 February 20 Zone 3 December 01 February 25 Zone 2: November 28 th to March 13 th (106 days) Zone 3: November 21 st to March 21 st (121 days)

22 Summary (Both Programs) Change fixed earliest and latest dates to be consistent with current weather patterns Change climate zones to adequately represent weather in different areas of the province Continue to use rational method (flexible) to start and end either program Most years, this will have no (or negligible) effect on Industry

23 Next Steps (Both Programs) Seeking input from Industry by December 2 nd, 2016 Industry concerns will be presented by Engineering and Operations of MI to the Minister of MI for further direction

24 SRR /WSW Policy Review Thank You. Questions? Contact: Jan McKee Trucking Industry Liaison Traffic Engineering Branch Manitoba Infrastructure Phone: (204)

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