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Belief
Cities should generally redesign streets to slow cars down, even when that lengthens drive times. 0.50 Agree Disagree
If you disagree, this page has a column for you. A study, record or dataset for “Whether a crash kills someone depends mostly on speed, so a street built for slower driving saves lives without relying on drivers choosing to behave better”, which rests on argument alone.
Argument TreesHow arguments are scored →
Reasons to agree
Reasons to disagree
Weight for 0.00 · weight against 0.00 · net +0.00
Each reason is a claim with its own page. Score = sign x (2 x Truth - 1) x Conf x Link x Imp x Uniq, and every column is here so the row can be multiplied out and checked. A reason argued false scores negative and counts against the side it is filed on; a reason nobody has argued yet scores exactly 0, and so does one whose own page has no work behind it.
What Would Change the AnswerTruth scores →
Every claim beneath this page held at false and then at true, one at a time, with the whole graph recomputed each time. "If false" and "if true" are where this page’s truth score lands; "Move" is how far apart they are. "If settled" is that same distance with the input’s confidence held at 1, which is what it would be worth once the work behind it is finished, so the gap between Move and If settled is the value of doing that work. This is one input at a time and finds single points of failure; it does not test several inputs moving together, which is how correlated assumptions actually fail.
Related Beliefs
- Banning the sale of new gasoline cars by a fixed date is generally a mistake. 0.50
- Cities should generally redesign streets to slow cars down, even when that lengthens drive times. (this page)
The other beliefs filed under Autos; this one is listed unlinked.
Not filled in yet
| Evidence Ledger | no findings cited yet |
| Falsifiability Test | nothing named that would strengthen or weaken this belief if it turned up |
| Testable Predictions | nothing stated that we should observe if this belief is true or false |
| Objective Criteria | no yardstick both sides would accept in advance has been proposed |
| What Acting On This Would Cost and Gain | no costs or benefits priced yet |
| Logical Anatomy | the claim has not been split into its component parts |
| Interests, Not Positions | nobody has mapped who wants what, or why |
| Media Resources | no books, studies or films weighed |
| Legal Framework | no laws or rulings cited |
| General to Specific | not linked to broader or narrower beliefs |
Parts of the template nobody has filled in here. They are named rather than shown, because an empty table is not a finding, and each one is a reason the confidence above is not higher. A part that takes rows has a form for its first one.
What this page needs right now
| # | The gap | Where it goes | Who is best placed to fill it |
|---|---|---|---|
| 1 | A study, record or dataset for “Whether a crash kills someone depends mostly on speed, so a street built for slower driving saves lives without relying on drivers choosing to behave better”, which rests on argument alone | Evidence Ledger | anyone with the source |
| 2 | A measurement both sides would accept in advance, with the reading each side predicts | Objective Criteria | anyone who can name a yardstick the other side would sign |
Named gaps, read off the tables above, so a newcomer can see exactly where a contribution goes. None of them requires agreeing with the page, and each one links to the form it goes in.
What the numbers are made of
- Share on the agree side
- no scored weight either way
- Confidence
- 32%. Weakest parts: scrutiny 0% · grounding 0%
- Depended on
- ReasonRank 0.0033, 39 of 2173
- Strongest reason for
- Whether a crash kills someone depends mostly on speed, so a street built for slower driving saves lives without relying on drivers choosing to behave better. +0.00
- Strongest reason against
- Longer trips cost workers, deliveries and emergency vehicles real time every single day, and those costs add up across a whole city. -0.00
- What would move this most
- Settling Whether a crash kills someone depends mostly on speed, so a street bu…: 0.50 if false, 0.50 if true
- Coverage
- Of 6 scored rows, 6 have no linkage page, 6 have no importance page, 6 have no uniqueness page. This page reads 6 other pages. 6 of them are one-sided or empty: Whether a crash kills someone depends mostly on speed, so a street built for slower driving saves lives without relying on drivers choosing to behave better.; Streets where cars move slowly are streets where children, old people and cyclists can safely be, which gives everyone a choice besides driving.; Redesigning a street to slow cars costs each driver a small amount of time on each trip, while the safety gained is shared by every person who uses the street.; Longer trips cost workers, deliveries and emergency vehicles real time every single day, and those costs add up across a whole city.; Slowing a main road pushes drivers onto neighborhood side streets, moving the danger to places that were quiet before.; In most places most people have no practical alternative to driving, so making driving worse punishes them without giving them a better option..
- Bottom line
- It turns on how many minutes of driving time a community will trade for fewer deaths and more people able to walk and bike.
Structural Checks
| Finding | How serious | What it means |
|---|---|---|
| Nothing stated would show it false | a note | No testable prediction is listed, so as written there is no observation that would count against this belief. |
Faults the shape of the argument can show without reading a word of it: a claim used to support itself, a conclusion listed among its own premises, the same page counted twice. None of these changes a score. The wiki also specifies pattern-matching the prose for ten named fallacies; that is deliberately not done here, because a matcher looking for “attacking the person rather than the argument” would fire on the central legitimate argument on this whole site, and a score moved by a regular expression has no page to appeal to.
Scoring EngineTruth scores →
| Quantity | Value | How |
|---|---|---|
| Argument score | +0.00 | argument rows: weight for minus weight against |
| Evidence score | +0.00 | evidence rows: weight for minus weight against |
| Prediction contribution | +0.00 | prediction rows, same signed formula as every other row |
| Belief score | +0.00 | the three lines above added together |
| Positive total | 0.00 | every row whose signed contribution came out positive, from either side |
| Negative total | 0.00 | every row whose signed contribution came out negative, as a magnitude |
| Starting point | 0.50 | where this claim starts before any of its own rows count: Nothing observed: no source type recorded, so this claim starts at a coin flip |
| Weight of the starting point | 1.00 | k x a bounded reward for independent replication, k = 1, capped at 2.0 x k |
| Truth score, argued | 0.50 | (positive + weight x starting point) / (positive + negative + weight) |
| Truth score | 0.50 | argued truth, capped by the weakest load-bearing component that has its own page |
| ReasonRank | 0.0033 | how much of the site depends on this page: rank 39 of 2173. The share of a walk that starts at the 162 beliefs and steps to the pages they read, with a 0.85 chance of stepping on each time |
| Work value | 0.0023 | ReasonRank x (1 - confidence): how much settling this page would be worth to everything above it |
| Completeness | yes | at least one scored reason on each side (an importance page: at least one interest; an interest page: both readings filled) |
Cite this page Cities should generally redesign streets to slow cars down, even when that lengthens drive times. Idea Stock Exchange, belief page cities-generally-redesign-streets, truth 0.50, confidence 32%, revision 42c8344 of 2026-10-04. The revision is what makes this quotable: these numbers move as the argument is worked on, and rebuilding that revision reproduces them exactly.
Every number on this page as data: cities-generally-redesign-streets.json. Constants: K = 1 · UNARG = 0.5 · DEFLINK = 1 · DEFIMP = 0.5 · DEFUNIQ = 1. A reason placed under a conclusion is presumed relevant until a linkage page says otherwise; the burden is on the challenger. The neutral start for importance, the wiki's own rule.
Every value here is computed from the tables above at build time. Nothing is typed.