Skip to content
Quality Assurance

Application Telemetry

Onboard telemetry logs each bar’s commanded and delivered rate against the Engineer’s target, GPS-referenced by station and offset. Below is a sample record showing the format: one 50-ft interval per row, including a documented mid-run target change.

Operator's hand at the in-cab control console of a LeeBoy PR900 distributor, a color display above a row of toggle switches
In-cab console, LeeBoy PR900, front and rear bar totalsIn-cab control console, LeeBoy PR900: front and rear spray bar totals displayed separately, one bar for each material
Why It Matters

Built for Verification

Rear spray bar of a LeeBoy PR900 distributor seen from the side, nozzles spraying onto a lined test lane
LeeBoy PR900 rear bar applying a metered rateLeeBoy PR900 rear spray bar applying a metered rate on a test lane
A hand pressed onto a freshly treated pavement surface beside a kneeling crew member's boot
Checking the surface by hand at NCATChecking the surface by hand at NCAT, where the two materials come together

State specifications already regulate distributor rate control and verification. GDOT Section 424, for example, requires an adjustable distributor delivering 0.04 to 1.0 gal/yd² within ±0.02 gal/yd², with measuring devices the inspector checks before and after each application. The telemetry record is designed to align with that existing language: commanded and delivered rates per bar, deviation flags against the Engineer’s tolerance, and segment reconciliation against delivery tickets, in a format an inspector signs, not a calibration exercise the agency must run.

And the record cuts both ways, on purpose: out-of-tolerance intervals are flagged automatically, stay in the log, and are resolved under the contract’s acceptance criteria as documented corrective action. The result is a field-auditable link between the material specification and the delivered application, material by material, station by station.

Discuss agency specifications

Sample segment record

Record
OPS-TLM-SAMPLE-0417
Sample · illustrative data
Route / lane
SR 0000 EB, Lane 1 (Driving)
Limits
Sta. 1250+00 to Sta. 1300+00 (5,000 ft)
Shift
Night shift 22:00 to 02:00 · segment record 1 of 6
Unit
Dual spray bar distributor · Unit ID OPS-DB-114
Positioning
WGS 84 / RTK-corrected, ±0.9 in. horizontal
Log rate
1 Hz logged · aggregated to 50-ft station intervals
Rate basis
Residual application rate, gal/yd², per bar
Specification
Agency special provision (sample)
Deviation band
±0.0025 gal/yd² (demonstration assumption)
Bar 1
Material A: customer-specified primary material
Supplier
Qualified Supplier A
Lot
LOT A-26041102
Target
0.0400 gal/yd²
Tank temp
165 °F
Bar 2
Material B: customer-specified secondary material
Supplier
Qualified Supplier B
Lot
LOT B-26040873
Target
0.0100 gal/yd²
Tank temp
142 °F

Segment reconciliation

273.4gal
Material A placed
68.4gal
Material B placed
6,667yd²
Area treated
0.051gal/yd²
Weighted avg. rate
4.00:1
Achieved ratio
98.0%
Intervals in tolerance
Segment record · Sta. 1265+00 to 1271+50 · 14 of 100 intervals shownSwipe sideways to see every column
Sample segment record: one 50-ft interval per row with commanded and delivered rates per bar
StationTimeBar 1actual / targetBar 2actual / targetCombinedgal/yd²Ratioby volumeDeviationband = ±0.0025 gal/yd²Status
1265+0022:17:520.0395/0.04000.0101/0.01000.04963.91:1-0.0004In tol.
1265+5022:17:590.0401/0.04000.0099/0.01000.05004.05:1+0.0000In tol.
1266+0022:18:070.0399/0.04000.0097/0.01000.04964.11:1-0.0004In tol.
1266+5022:18:140.0428/0.04000.0107/0.01000.05354.00:1+0.0035Out of tol.
1267+0022:18:220.0424/0.04000.0106/0.01000.05304.00:1+0.0030Out of tol.
1267+5022:18:290.0411/0.04000.0103/0.01000.05143.99:1+0.0014Adjusting
1268+0022:18:360.0437/0.04400.0110/0.01100.05473.97:1-0.0003Adjusting
1268+5022:18:440.0435/0.04400.0110/0.01100.05453.95:1-0.0005In tol.
1269+0022:18:510.0434/0.04400.0109/0.01100.05433.98:1-0.0007In tol.
1269+5022:18:590.0445/0.04400.0111/0.01100.05564.01:1+0.0006In tol.
1270+0022:19:060.0439/0.04400.0109/0.01100.05484.03:1-0.0002In tol.
1270+5022:19:140.0436/0.04400.0109/0.01100.05454.00:1-0.0005In tol.
1271+0022:19:210.0437/0.04400.0109/0.01100.05464.01:1-0.0004In tol.
1271+5022:19:280.0436/0.04400.0111/0.01100.05473.93:1-0.0003In tol.
Flagged intervals: 2 (100 ft) · Coverage: complete

Event log extract

  • 22:18:141266+50RATE-CHANGEOperator changed the combined target from 0.0500 to 0.0550 gal/yd²; the new target takes effect at Sta. 1268+00. Within the Engineer’s target band.
  • 22:18:141266+50AUTO-FLAGCombined rate 0.0535 exceeded standing target by 0.0035 gal/yd² during ramp. Auto-logged. Ratio held 4.00:1.
  • 22:18:221267+00AUTO-FLAGCombined rate 0.0530, deviation 0.0030 gal/yd². Ramp continuing.
  • 22:18:291267+50AUTO-CLEARDeviation returned within ±0.0025 gal/yd². Total flagged length 100 ft.
Contractor representative
Agency inspector
Date

Flagged intervals: 2 (100 ft), all associated with a documented target change and cleared within the same log. Tank draw reconciles to delivery ticket within 0.2 gal (A) and 0.1 gal (B). In a project record, the full interval set and complete event log accompany the submittal package.

The record above is illustrative: synthetic numbers demonstrating the record format, not data from a named project. Agencies evaluating the platform can request project telemetry samples under the appropriate agreements.

Start with a Pilot

A research pilot or experimental feature is the simplest way for an agency to evaluate the platform on its own network.

Start a Pilot ConversationRequest Documentation