When the Train Comes Through, What Happens to Your Road?
Road severance and grade separation on the ALTO HSR corridor — what it means, what the government’s own documents say, and what hasn’t been disclosed.
A high-speed rail line must be completely fenced and grade-separated — meaning every road that crosses it needs either a bridge or an underpass, or it gets permanently dead-ended. Transport Canada has confirmed that a Toronto–Québec City HSR corridor crosses more than 1,000 roads. ALTO HSR has not told the public how many of those roads will receive crossings, and how many will simply be cut off.
The public consultation closes April 24, 2026 — before this information will exist.
Why It Matters for Every Road in the Corridor
A high-speed rail line running at 300 km/h cannot share space with road traffic. It must be fully enclosed — fenced on both sides — and every place where a road crosses the track must have a bridge or underpass built. This is called grade separation.
If a bridge or underpass isn’t built at a crossing, the road is permanently cut off. Properties, farms, and communities on one side of the track can no longer reach the other side without travelling kilometres out of their way to the nearest crossing. That is called road severance.
ALTO’s own Engineering VP confirmed at the February 17, 2026 Kingston City Council meeting: “It doesn’t matter if it’s 200 kilometres an hour, 300 kilometres an hour. It has to be fully fenced so that there can be no intrusions from pedestrians, wildlife, and vehicles.”
Transport Canada’s Briefing Note, March 2023
In March 2023, Transport Canada prepared a briefing for a Parliamentary committee on the difference between the original lower-speed rail concept and a full high-speed system.
The context is usually lost, and it matters. The passage below sits under the heading “Why not high-speed rail?”, among the answers prepared in case the Minister were pressed on the question. The figure was not a description of what the government intended to build. It was part of its case for not building it.
“A full, high-speed rail system between Quebec City and Toronto would require a fully enclosed (fenced) corridor, a straighter alignment with full, double tracking, as well as complete grade separation (the use of viaducts and tunnels) on an alignment that currently has over 1,000 public and private crossings.”
Transport Canada, TRAN Committee Appearance Binder — Item 15: High Frequency Rail, March 7, 2023. tc.canada.ca
The briefing note does not stop there. Its very next sentence says a full high-speed service would also be “more disruptive to communities and to the ecosystem” than the lower-speed project, and would lack some of the benefits of connecting regional centres.
That is the federal transport department, on the record, giving disruption to communities and ecosystems as a reason to prefer the alternative. The project now being advanced is the full high-speed system. Those stated objections have never been publicly revisited or withdrawn.
ALTO HSR is explicitly a full high-speed rail system at 300 km/h. By Transport Canada’s own characterization, it therefore requires complete grade separation on a corridor with more than 1,000 road crossings.
What “complete grade separation” does not mean. The briefing note explains the phrase as the use of viaducts and tunnels. That describes the railway’s condition — no level crossings anywhere along the line — not a promise about roads. A corridor is completely grade separated whether your road is carried over it on a bridge or simply stopped at the fence. The Transport Canada figure tells us how many crossings exist. It is silent on how many would be kept.
Why not every road gets a bridge. Building a bridge over a double-track HSR corridor is expensive — typically $5 to $12 million per structure for a rural overbridge in Ontario. For a quiet gravel road or farm laneway, the cost of a bridge far exceeds what the road is worth to the project. In every HSR project built anywhere in the world, some crossings get bridges and some don’t. Rural Ontario’s concession road grid was designed so that roads cross every 1.25 miles (about 2 km). A farm property, a school, or a home on the wrong side of a dead-ended road may suddenly find its nearest crossing is 4 to 8 km away.
Which Roads Are Most at Risk
| Road Type | Likely Treatment | Outcome |
|---|---|---|
| Provincial highways (400-series, secondary) | Bridge or underpass required by law | Crossing provided |
| County roads (significant traffic) | Bridge standard practice | Crossing provided |
| Township / concession roads (paved) | Depends on traffic volumes; some closures likely | Many provided; some closed |
| Gravel roads and local municipal roads | Cost-benefit assessment; closure if alternative route exists | Uncertain |
| Farm laneways and private access roads | Typically closed; compensation paid | Usually closed |
What ALTO Said at Kingston City Council — February 17, 2026
ALTO’s Vice-President of Systems Engineering, David Cook, appeared before Kingston City Council and answered questions about road crossings. His answers contain a revealing progression.
The Reassurance: “The working assumption is that every road will get some sort of duct or overpass. Those roads belong to a municipality, or are under the purview of a road authority — could be a county or the province. And so therefore we can’t just cut them unilaterally.”
The Qualification: “Now, of course, in reality, we will look at potentially consolidating some of those crossings in order to lower costs and improve construction. But that doesn’t happen without a discussion with the municipality or the road authority.”
The Admission: “The issue about grade separations along the corridor has to be looked at. Some areas there may be more, some areas there may be less… So try and limit the number of overpasses that we’ll need to get created for sure.”
What this means: The “working assumption” that every road gets a crossing is not a commitment — it’s a starting point. Cook confirmed in the same session that ALTO’s goal is to minimize the number of overpasses built. The councillor who asked whether there would be a standard distance between bridges never received an answer. No standard exists, and no commitment to provide one was made.
Source: City of Kingston closed-captioning transcript, February 17, 2026.
What Road Severance Actually Means
Emergency Response. Under Ontario law, paramedic services must target a response time of 6 minutes or less for cardiac arrest calls. Research published in BMC Emergency Medicine (2025) found that each additional kilometre adds approximately 37 seconds to rural response time. Multiple peer-reviewed studies show each extra minute of delay reduces cardiac arrest survival probability by 6–10%. A road closure that forces an ambulance to detour 5 km adds roughly 3 minutes. ALTO has not modelled or published any analysis of how road severances would affect emergency response times.
School Buses. Ontario school bus operators are not required to travel roads that are not maintained year-round by the municipality. A dead-ended concession road may lose its maintenance justification, meaning students living on it lose bus eligibility. Route detours add travel time that accumulates across dozens of routes — costs that come out of a provincial Student Transportation Fund of approximately $800 million per year.
Farm Operations. Many Eastern Ontario farms depend on the ability to move equipment between fields on both sides of what will become a fenced rail corridor. A 6–10 km equipment detour, repeated daily throughout growing season, is a genuine operating cost — and in some cases makes field configurations economically unworkable.
An Unacknowledged Carbon Cost. When roads are closed, the households and farms that used those crossings must drive further for every trip. A conservative estimate based on 300 road closures produces roughly 3,000–7,000 tonnes of additional CO² per year corridor-wide. Over 50 years, that compounds to 150,000–365,000 tonnes. ALTO has not acknowledged this emission category in any published document.
$3–8 Billion Gap in ALTO’s Estimates
ALTO has published a capital cost estimate of $60–90 billion for the full corridor. That range has never been independently verified, and ALTO has not released a breakdown of what’s included. Based on Ontario bridge construction data and international comparators, grade separations for the crossings that are provided would cost approximately $3.2 to $8.4 billion CAD — a line item that has never been named, let alone costed, in any ALTO publication.
The UK HS2 Comparison. Britain’s HS2 Phase 1 (London–Birmingham, 225 km) involves more than 500 bridging structures, including over 50 major viaducts — roughly 2.2 structures per kilometre. That is a high rate of provision, and it did not spare the route from closure disputes. Communities could only secure crossings by petitioning Parliament through a formal legal process, which generated 497 undertakings and assurances by mid-2023. Even then, a busy classified A-road, Risborough Road in Buckinghamshire, was permanently closed where HS2 crossed it.
A structure count is not a count of preserved crossings. Bridging structures include everything a railway needs to cross a landscape: viaducts over rivers and valleys, separations where the line meets a motorway or existing railway, and the structures carrying the line through difficult ground. Roughly nine tenths of HS2 Phase 1 runs in tunnel, in cutting or on structures, so a large share of those 500 carry the railway over something rather than carrying a community across the railway. A high structure count and a high closure rate are entirely compatible, and on HS2 they happened together.
Canada has no equivalent petition mechanism. The only formal opportunity to raise crossing concerns is the current consultation — which closes April 24, 2026, before any route or crossing plan has been published.
A Specific Ask Before the Consultation Closes
ALTO HSR has not published a preferred route, a road crossing assessment, or any methodology for deciding which roads get bridges and which get closed. ALTO’s Engineering VP confirmed that no detailed route will be selected until at least the end of 2026 — after the consultation closes.
Communities are being asked to comment on a project whose most immediate local impact — which roads will be cut off — has not been determined, modelled, or disclosed.
ALTO HSR should be required to publish, before corridor selection:
A preliminary road crossing assessment identifying the number and type of crossings on each corridor option.
The criteria that will determine whether a crossing receives a bridge or is closed.
The methodology for assessing whether proposed detour routes are adequate for emergency response, farm operations, and school buses.
A commitment that crossings on established emergency response routes will be protected regardless of traffic volume or cost.
Sources
- Transport Canada, TRAN Appearance: Main Estimates 2023-2024, Hot Issues, Item 15: High Frequency Rail, March 7, 2023. The crossings passage and the “more disruptive to communities and to the ecosystem” sentence both appear under Q15, “Why not high-speed rail?”, in the “If pressed” block. tc.canada.ca
- Ontario Regulation 257/00 under the Ambulance Act, Part VIII. 6-minute target for Sudden Cardiac Arrest; 8-minute target for CTAS 1. ontario.ca
- BMC Emergency Medicine (2025). “Modelling emergency response times for OHCA patients in rural areas of the North of England.” doi: 10.1186/s12873-025-01170-7
- Multiple sources: PMC 12065030 (Bangkok EMS, 2025): 6% per minute; NCBI NBK321505 (Larsen et al., 1993): 7–10% per minute; JAHA (Kitamura et al., 2018): 11% per minute.
- Ontario MTO School Bus Handbook; STSCO KPR Transportation Guidelines, Section 1.2. stsco.ca
- Ontario Ministry of Education, Student Transportation Fund: approximately $800 million per year provincewide.
- Bridge cost data: MTO Southern Highways Program published tender cost ranges, 2022–2024. Aggregate cost range ($3.2–8.4B) derived from estimated 400–700 grade separations at $5–12M average per structure.
- HS2 Phase 1: more than 500 bridging structures including over 50 major viaducts across a 225 km route, per Tomas Garcia, Head of Civil Structures, HS2 Ltd, reported in New Civil Engineer, June 2022, and per the Institution of Civil Engineers. Pickmere Parish Council petition, July 2023. Risborough Road closure: HS2 Ltd Notice of Closure, February 2024. 497 undertakings and assurances: UK Parliament HS2 Phase 2b Select Committee proceedings, August 2023.