Bibliographic record
Abstract
A multi-lane roundabout is currently under construction at the south end of Highway 406, the main highway connecting the cities of St. Catharines and Welland in southern Ontario. The southern section of Highway 406 is being expanded to a four-lane divided highway with grade-separated interchanges, and the roundabout will facilitate its termination at East Main Street in Welland. The use of roundabouts at highway terminations is common in countries where roundabout use is widespread, but rare in the United States and Canada. This paper describes development of the horizontal geometry of the roundabout, and some issues associated with the advance signing. During the conceptual design process decisions were made about the lane configuration of the roundabout, whether to shift the roundabout to avoid a nearby parking lot, whether to implement a southbound semi right-turn bypass ending in a yield condition or a fully-channelized bypass, and whether to construct an interim design for the roundabout or implement the ultimate design at the outset. During the preliminary design process decisions were made about the methodology by which large trucks would be accommodated, and the type, size and location of the advance signage associated with the roundabout. Overpass work along the two-lane section of Highway 406 commenced in 2010, and the widening of the highway commenced in 2011. Construction of the multi-lane roundabout began in late 2012. Completion of the entire project, under the jurisdiction of the Ministry of Transportation Ontario (MTO), is expected in the fall of 2013. (A) For the covering abstract of this conference see ITRD record number 201310RT334E.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.004 | 0.005 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.000 | 0.001 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.004 | 0.002 |
| Scholarly communication | 0.002 | 0.002 |
| Open science | 0.003 | 0.001 |
| Research integrity | 0.004 | 0.001 |
| Insufficient payload (model declined to judge) | 0.006 | 0.001 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".