Frequently asked questions

Full culvert replacement requires excavating through the entire roadway cross-section to remove the old corrugated metal pipes and install the new pre-cast concrete box culvert bridge. There is no safe way to maintain travel lanes over an open excavation of this scale. A full road closure is also required to comply with environmental Time of Year restrictions that govern in-stream construction near protected aquatic habitat.

Tighe & Bond has confirmed that maintaining a single lane on Providence Street would require phased construction, which would likely double the construction duration and significantly increase project costs. It would also require substantial redesign and could affect secured and pending permits.

For residents on the most-affected side of town, the detour adds approximately 19 minutes per trip. This affects an estimated 150 to 200 households on streets south of the bridge. Construction is expected to last approximately four to five months.

The replacement is a three-sided pre-cast concrete box culvert bridge with a 19-foot clear span. It replaces twin 36-inch corrugated metal pipes that had deteriorated to the point of structural risk. Key improvements:

• Designed for 100-year storms — it will not overtop the way the old pipes did in 2023 and 2024
• 75+ year service life (pre-cast concrete vs. deteriorated corrugated metal)
• Open stream bed — natural substrate is preserved, restoring aquatic passage for the American Brook Lamprey, a state-listed threatened species
• New Cape Cod berms and catch basins improve roadway stormwater quality before it reaches Spring Brook

Construction cost is approximately $2.1 million. Engineering design and oversight adds approximately $400,000 depending on the level of oversight selected. Funding sources:

• DER Stream Crossing Grant: $116,000 (awarded — supports engineering)
• DOT Grant: $100,000 (awarded — supports engineering)
• DOT Construction Grant: $1,000,000 (applied, pending award)
• Local municipal capital allocation: balance funded through Town Meeting appropriations, including debt

Annual Town Meeting warrant Articles 14 and 15 provide for the local funding component.

The engineering plan (Tighe & Bond, as documented in the traffic plan memo) routes detour traffic via Milford Street and Hartford Avenue. Cemetery Street is designated as one-way in the engineering recommendation — direction and signage to be established by the Select Board's decision and official field posting.

The engineering recommendation is one-way. Tighe & Bond concluded this is the safest and most expedient option for several reasons:

• The intersection at Hartford Avenue East has stone walls that severely limit sight distance, creating blind corners for turning vehicles
• Morning solar glare at that intersection significantly worsens the visibility problem
• Two-way traffic through the narrow corridor creates turning-movement conflicts for larger vehicles and emergency apparatus
• The detour routes use roads with standard two-way cross sections, better sight distance, defined centerlines, and stop-controlled intersections — geometrically superior to Cemetery Street for absorbing extra traffic
• Fire Chief Bangma has specifically stated that two-way traffic delays emergency vehicle returns to the fire station and creates hazardous conditions at the Hartford Avenue turn
• A Cemetery Street resident has reported vehicles already traveling at 45 to 50 mph — adding opposing traffic to a road with existing speed problems increases head-on collision risk

For the complete staff and expert response to all resident questions about Cemetery Street, see the Cemetery Street Q&A.

Yes. On April 15, 2026, the Select Board voted unanimously to keep Cemetery Street one-way during construction, adopting the engineering recommendation from Tighe & Bond. See the decision page for the meeting recap and video recording.

Important: The Board reserves the right to adjust traffic or detour plans if new information or safety concerns emerge — up until construction starts. Prudent adjustments remain possible if conditions change before work begins.

Some residents have formally proposed a two-way configuration with mitigations: a temporary truck weight limit, flashing yellow lights at Hartford Avenue, and lower speed limit signs. Tighe & Bond has evaluated these ideas and found that two-way operation — including alternating-direction traffic — presents more disadvantages than advantages. No traffic study has been completed for two-way operation, and conducting one would be an additional cost outside the current project scope. See the Cemetery Street Q&A for the full engineering response.

MURSD has confirmed that the detour adds approximately 20 minutes per bus run, with buses running three times daily per school level. During the last Providence Street closure, buses were instructed to go the wrong way with flashers — MURSD has described this as not a safe solution.

Police have confirmed they can authorize wrong-way bus access on Cemetery Street with dedicated overtime coverage. The formal coordination with MURSD will be finalized as the construction date approaches. See the Cemetery Street Q&A for the full MURSD and police responses.

Massachusetts General Law Ch. 87 s7b authorizes emergency vehicles to travel contrary to signs during emergency response. Police escort protocols from the previous closure will be reused. The Fire Department takes the detour for non-emergency returns. See the Cemetery Street Q&A for the complete response from the Fire and Police Chiefs.

Town Counsel has advised that the petition article is out of order and will not proceed. Town Meeting has the authority to appropriate funds, but the Select Board retains authority over traffic regulations — Town Meeting cannot restrict or interfere with the Select Board's statutory obligations. The petition (Article 16 on the draft warrant) will not be heard at Annual Town Meeting.

The record is fully documented in Select Board minutes. On November 1, 1994, the Board held a public hearing on the feasibility of making Cemetery Street one-way. The Selectmen had personally driven the road and found the Hartford Avenue East intersection "terrible" in the mornings. The primary concerns were truck traffic, commuter shortcutting, and intersection safety. A majority of residents at the hearing supported a trial. The Board voted unanimously to make Cemetery Street one-way on a 30-day self-renewing trial beginning November 19, 1994.

By January 1995, a majority of Cemetery Street residents had written to thank the Board, stating the change "created a safer environment." No reversal motion was ever made. Because the motion was drafted as "self-renewing," it continued automatically — which is why no separate permanent vote was ever taken. The trial simply never stopped.

On the Town website — traffic plan memo (PDF). You can also browse all Town postings in the Document Center on mendonma.gov.

Use official channels first — not only neighborhood social media threads:

• Town of Mendon website — news, CivicAlerts, and Document Center postings
• Agenda Center — Select Board agendas, minutes, and recordings for all project discussions and votes
• Mendon Police Department — road closure announcements; sign up for CodeRED for alerts

For project-specific questions, contact Highway at 508-473-0737 or highwaydpt@mendonma.gov.