Two examples
| Document | What the public page states |
|---|---|
| Maine DOT Technical Memorandum 03-11 (March 2004) | Titled “Preliminary Results from Field Testing of Alternative Carbide Edge Snow Plow Blades”; the archive page lists the date and agency but I could not retrieve the PDF |
| Clear Roads Project 07-01 (completed September 2010) | Aimed to develop test procedures to predict insert performance; the page says lab tests showed that inserts with flaws in the lab also had the poorest field performance, and recommended work toward a national standard and a purchasing approval framework |
A checklist for old research
An old study can still be useful if you check what has changed since.
- Date. How old is it, and what has changed in products since?
- Status. Is it preliminary or final?
- Product. Is the exact design still sold, and is it the same specification?
- Method. How was wear measured, and was there a control?
- Conditions. Which roads, traffic, climate and trucks?
- Funding and independence. Who ran it?
- Follow-up. Was it repeated or superseded?
How to use what you find
Old trials are useful for method and questions, not for numbers that have aged out.
- Take the method and the questions, not the numbers. Materials and equipment have changed since the trial ran.
- Use older results to decide what to test now. A finding that still matters is worth re-testing on your own routes.
- Cite the date whenever you quote it. An undated number reads as current.
What not to do
- Do not quote a “preliminary” result as a conclusion.
- Do not apply one state’s result to your routes without a trial.
Query date: October 24, 2026.
A one-page template for citing old work
When you quote an older study, write five lines: title and date, who ran it, what was tested, what was measured and your reason for using it now. Add one line saying what you would need to test again today. Keeping this note with the source makes it harder to repeat an old claim without its limits, and it helps a colleague judge the evidence in seconds.
Boundary: only public catalog and project pages were read; the Maine memo’s content is not described and the Clear Roads statements are quoted from its project page.
Sources and further reading. External references are dated; where a figure is quoted, the link shows where it came from.
Maine Department of Transportation: Technical Memorandum 03-11: Preliminary Results from Field Testing of Alternative Carbide Edge Snow Plow Blades (catalog page only) (March 2004) ↗Clear Roads: Development of Standardized Test Procedures for Carbide Insert Snowplow Blade Wear (Project 07-01) (completed September 2010) ↗Can a scan of an old blade replace an approved manufacturing drawing? ↗The road is freshly resurfaced. What should we confirm before a blade trial? ↗Carbide snow plow blades ↗When Plow Drivers Are Scarce: Planning Fewer Blade Changes per Route ↗Clear Roads 2026 Research Slate: What Blade and Materials Buyers Should Watch ↗Rented Trucks and Driver Gaps: What It Means for Edge and Parts Stock ↗
