The Buy Ontario Act officially came into effect on December 11, 2025, and the Buy Ontario Procurement Directive, including the Capital Infrastructure component, will take effect for all new capital infrastructure improvements on April 13, 2026.
Corrections to typographical errors have been made with respect to Anti-Stripping Treatment (AST) and Asphalt Cement Anti-Stripping Treatment (AST-AC), as applicable in OPSS 1151, SSP 11F06, and CAIS 1151-01. In CAIS 1151-00, WBCMS has been replaced with CMS. The corrections do not constitute any technical changes to the specification.
OPSS PROV 441 has been updated as per drainage specifications updating schedule and is ready for external stakeholders’ consultation prior to publishing the updated version of the specification.
February 4, 2026 - February 25, 2026 (21 days) Closed
Last updated
References to RFC is updated to IR/CR under Contract Execution; Referenced to SP100F08 is replaced with SP199F01 in Traffic & Safety; Grout Strength, Normal Shotcrete, and Linear Shrinkage Testing have been removed; Track Coat under Asphalt Section has been added and refer to the updated specifications; Lift Thickness under Asphalt Paving has same scoring structure as Performance Graded Asphalt Cement; Updated the reference for the preventive measures- question 1 under Environmental Performance and Compliance of the Monthly Rating.
We want to update CAIS 102 – Administration and Inspection Activities for Weighting of Materials. The changes in the CAIS are required to align with the proposed updates to OPSS.PROV 102 – Weighing of Materials.
We want to update OPSS.PROV 102- Weighing of Materials. The changes in the OPSS are required due to the Weights and Measures Act, as amended requiring changes to OPSS.PROV 102 – Weighing of Materials to align with the Act, as amended.
February 24, 2026 - March 24, 2026 (28 days) Closed
Last updated
NSP DB 1350 Material Specification for Concrete – Materials and Production has been updated for consistency with newly published OPSS.PROV 1350 (April 2025), to update payment adjustment $ values to reflect inflation and to add taking of RCP referee cores at the time acceptance cores are taken. As part of the specification publication process, Engineering Materials Office (EMO) Concrete Section is posting the draft specification for external stakeholders’ consultation prior to publication.
A Minister’s regulation is being proposed to make certain Ontario Provincial Standards for Municipal Road Construction (OPSS.MUNI) mandatory for municipalities.
December 3, 2025 - December 24, 2025 (21 days) Closed
Last updated
This Special Provision (SP) amending OPSS 905 has been developed to assist the industry in implementing welding practices that comply with MTO requirements.
December 3, 2025 - December 24, 2025 (21 days) Closed
Last updated
The proposal will include traffic control in the price for each item which ensures fair compensation for traffic control on items whose quantities have increased, without requiring burdensome administration like keeping DWRs.
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The proposed changes clarify the intent, making requirements clear to bidders:
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A minor change was made to the definition of Temporary Traffic Control Signs to avoid confusion over the word “supply.”
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The title of the Item will be changed to Temporary Traffic Control Staging.
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The work under the Item was specified to include only traffic control that persists longer than 24-hours, leaving shorter term traffic control to be paid under the associated Items.
November 12, 2025 - December 7, 2025 (25 days) Closed
Last updated
The manual will be published along with a release memo to implement CHBDC 2025 and announce its publication. Both documents will be available on MTO’s Technical Publications website.
August 18, 2023 - October 2, 2023 (45 days) Closed
Last updated
Following industry consultations, the draft MTO’s Prestressed Concrete Girder Guidelines and associated. Structural Standard Drawings will be published on the MTO’s Technical Publication website and implemented in CPS.
