Policy analysis

Every parking rule, mapped to the block.

Turnstone reads a program’s rules, maps them to every block, or Curb Zone, and flags where they conflict or leave gaps.

Rules pile up, one block at a time.

Over the years, small changes turn the curb into a patchwork no one can see in full.

Daytime, 9a to 6p

Each color is a different combination of rulesConflicting time limits
different rules
55
combinations of those rules
66
blocks with conflicting time limits
86
rules on a single block
8

Based on a medium-sized California program. Map is illustrative.

At this scale, no one can check every rule.

Occupancy, noncompliance, and every decision built on them depend on the right rule on every block. With this many rules, few programs can be sure.

  • Noncompliance measured against the wrong limit.
  • Occupancy counted in the wrong hours.
  • Patrols and rate reviews built on both.

Policy analysis finds what’s hiding.

Every issue is tied to its Curb Zone, so the program knows exactly where to look.

  1. 01

    Overlapping time limits

    Two limits on one block, so no one knows which applies.

    Knope WayFlagged
    2 hr max
    1 hr max
    Both apply
    8A1P6P
  2. 02

    Limits too short to enforce

    Strict on paper, and rarely held on the street.

    Ludgate StreetFlagged
    20 min max
    Typical stay 1 hr 40 min
    8A1P6P
  3. 03

    Loading over paid hours

    The same space sold for parking and held for deliveries.

    Eagleton PlaceFlagged
    Loading 8a to 12p
    $2.00/hr, 9a to 6p
    Both apply
    8A1P6P
  4. 04

    Rates out of line

    One Curb Zone priced apart from the rest of its Curb Area.

    Downtown CoreFlagged
    $2.00
    $2.00
    $3.50
    $2.00
    $2.00
    Curb Zone 1Curb Zone 5
  5. 05

    Gaps in the record

    Paid curb with no rule on file, so nothing can be measured.

    Sussex LaneFlagged
    2 hr max
    No rule on record
    8A1P6P

Rules meet the rest of the curb.

Every rule is read against what is on the curb and how it is used.

Set up during onboarding. Days, not months.

With clear rules, every lever works.

  1. 01

    Guided enforcement

    Patrols go where the real rules are broken most.

  2. 02

    Rates

    Rate changes for the full day, or just the hours that need it.

  3. 03

    Time limits and zones

    Limits and zones that match how the curb is used.

Every change is the program’s call.

Know the rules. Then improve them.

See what Policy analysis flags in your program.