R07.06.01.01 · TASK CLASS

Road alignment, profile & corridor design

Design alignments, profiles and corridors meeting design criteria.

20 project-authored proposals · taxonomy v1.1 · 0 new benchmark runs. Verifiers and partial-credit rules below are designs, not executed results.

Typical applications: Civil 3D · OpenRoads
Class GUI-need label: G3 · GUI-only

Task proposals · 20

Expand to inspect the complete original wording and proposed checks. Original proposal text remains English in both interfaces.

R07.06.01.01-T01 Design a rural road alignment through control points within radius and length limits

Original instruction

In Civil 3D 2025 open fixtures/valley_road.dwg (EG surface, control points CP1-CP6). Create alignment 'Rd-A' (design speed 50 km/h, Rmin 100 m) passing within 0.5 m of all six control points with at least 3 circular curves and total length 2.1-2.6 km. Create its EG profile and a profile view, and export station/easting/northing/EG elevation every 20 m to out/rd_a.tsv.

Platforms: win · Windows
Applications: Civil 3D
Interfaces: desk · Desktop GUI
GUI need · task setting: G3 · GUI-only
GUI need · ordinary access: AP · API-sufficient
Interaction primitives: geom · Precise geometry click · Point & click nav · Pan/zoom/scroll
Work product: WP04 · 3D/spatial model
Conditions: licensed · Licensed pro app
Proposed difficulty: 4 / 5

Proposed verifier

Harness exports LandXML via COM after save: alignment tangent continuity, all radii ≥100 m, ≥3 curves, length in range, CP offsets ≤0.5 m; EG profile sampled from surface; TSV rows every 20 m match LandXML ±0.01 m. .NET/LISP/Dynamo for Civil 3D disabled; command log checked.

Proposed partial credit

35% alignment geometry valid; 25% control points; 15% EG profile & view; 25% TSV

R07.06.01.01-T02 Lay a finished-grade profile meeting grade and K-value limits

Original instruction

For alignment 'Main St' in fixtures/main_st.dwg create layout profile 'FG' tying into existing elevations at 0+000 (102.35) and 1+240 (96.80): grades ≤6%, crest K ≥15, sag K ≥12, PVIs at least 80 m apart, and keep cut/fill within ±3 m of EG. Add vertical-curve labels to the profile view.

Platforms: win · Windows
Applications: Civil 3D
Interfaces: desk · Desktop GUI
GUI need · task setting: G3 · GUI-only
GUI need · ordinary access: CL · CLI-sufficient
Interaction primitives: geom · Precise geometry click · Point & click vis · Visual judgment
Work product: WP04 · 3D/spatial model
Conditions: licensed · Licensed pro app
Proposed difficulty: 3 / 5

Proposed verifier

LandXML: FG profile endpoints ±0.01 m; all grades ≤6%; K values per curve type; PVI spacing; sampled FG-EG within ±3 m every 10 m; labels present in profile view (DWG parse). APIs disabled.

Proposed partial credit

20% tie-ins; 25% grades; 25% K-values; 30% PVI spacing & cut/fill band

R07.06.01.01-T03 Build a corridor with daylighting and report cut and fill volumes

Original instruction

In fixtures/link_road.dwg build corridor 'Link' along alignment 'Link' and profile 'FG' using assembly 'Rural 2x3.5' (lanes 3.5 m at -2.5%, 1.5 m shoulders, daylight 1:2 cut, 1:3 fill) targeting EG, 10 m frequency. Create corridor surface, sample lines at 20 m, compute materials (average end area) and write total cut and fill to out/volumes.csv.

Platforms: win · Windows
Applications: Civil 3D
Interfaces: desk · Desktop GUI
GUI need · task setting: G3 · GUI-only
GUI need · ordinary access: CL · CLI-sufficient
Interaction primitives: click · Point & click geom · Precise geometry vis · Visual judgment
Work product: WP07 · Simulation result
Conditions: licensed · Licensed pro app
Proposed difficulty: 4 / 5

Proposed verifier

Harness: corridor exists with that assembly/frequency; corridor surface boundary; sample lines count; cut/fill within 2% of reference; daylight slopes verified at sampled sections. APIs disabled.

Proposed partial credit

35% corridor built; 20% surface; 15% sample lines; 30% volumes within tolerance

R07.06.01.01-T04 Apply superelevation at 60 km/h with 6% emax and verify runoff lengths

Original instruction

For alignment 'Ridge Rd' in fixtures/ridge.dwg (design speed 60 km/h), calculate superelevation using AASHTO 2011, emax 6%, 2-lane crowned, pivot at centerline, 2/3 runoff on tangent. Ensure corridor 'Ridge' uses it and no superelevation critical stations overlap. Export the superelevation table to out/se.csv.

Platforms: win · Windows
Applications: Civil 3D
Interfaces: desk · Desktop GUI
GUI need · task setting: G3 · GUI-only
GUI need · ordinary access: CL · CLI-sufficient
Interaction primitives: click · Point & click type · Text & forms vis · Visual judgment
Work product: WP04 · 3D/spatial model
Conditions: licensed · Licensed pro app
Proposed difficulty: 4 / 5

Proposed verifier

se.csv full-super rates per curve equal AASHTO table values for radius/speed; runoff lengths ±1 m of reference; corridor cross-slopes at full super stations ±0.1%; no overlapping transitions. Civil 3D .NET API, AutoLISP, .scr scripts and Dynamo for Civil 3D are disabled for the agent; the DWG and outputs must come from a Civil 3D session, checked against its command log.

Proposed partial credit

30% e rates; 30% runoff lengths; 25% corridor applied; 15% table export

R07.06.01.01-T05 Convert a sketch polyline into an alignment with spirals and pass design checks

Original instruction

In fixtures/bypass.dwg convert polyline 'BYPASS_SKETCH' into alignment 'Bypass' (80 km/h) replacing each PI with a spiral-curve-spiral (clothoid, A ≥ minimum for 80 km/h per docs/design_std.pdf, R ≥250 m). Apply the design check set 'STD80' and resolve all violations.

Platforms: win · Windows
Applications: Civil 3D
Interfaces: desk · Desktop GUI
GUI need · task setting: G3 · GUI-only
GUI need · ordinary access: CL · CLI-sufficient
Interaction primitives: click · Point & click geom · Precise geometry type · Text & forms
Work product: WP04 · 3D/spatial model
Conditions: licensed · Licensed pro app
Proposed difficulty: 3 / 5

Proposed verifier

LandXML: each PI has spiral-curve-spiral with A and R ≥ limits; PI locations within 0.1 m of sketch PIs; design check set assigned and 0 violation markers. Civil 3D .NET API, AutoLISP, .scr scripts and Dynamo for Civil 3D are disabled for the agent; the DWG and outputs must come from a Civil 3D session, checked against its command log.

Proposed partial credit

25% alignment from polyline; 40% SCS elements per PI; 20% design checks clean; 15% PI fidelity

R07.06.01.01-T06 Create an existing-ground surface from survey points with breaklines

Original instruction

In fixtures/site_survey.dwg import input/topo.csv (PNEZD) into point group 'TOPO', create TIN surface 'EG' from it with breaklines from layer V-TOPO-BRKL and outer boundary from polyline 'SURVEY_LIMIT'. Set 0.5/2.5 m contours style and save.

Platforms: win · Windows
Applications: Civil 3D
Interfaces: desk · Desktop GUI
GUI need · task setting: G3 · GUI-only
GUI need · ordinary access: CL · CLI-sufficient
Interaction primitives: click · Point & click type · Text & forms
Work product: WP04 · 3D/spatial model
Conditions: licensed · Licensed pro app
Proposed difficulty: 2 / 5

Proposed verifier

LandXML surface: point count equals CSV; breaklines included; boundary applied; elevations at 30 test locations within 0.01 m of reference TIN; contour style intervals. Civil 3D .NET API, AutoLISP, .scr scripts and Dynamo for Civil 3D are disabled for the agent; the DWG and outputs must come from a Civil 3D session, checked against its command log.

Proposed partial credit

30% points imported; 30% breaklines; 20% boundary; 20% style

R07.06.01.01-T07 Create plan-and-profile sheets with bands and standard labels

Original instruction

For alignment 'Main St' in fixtures/main_st_design.dwg add data bands (EG/FG elevations, cut/fill, stations at 20 m) to the profile view, apply label sets from fixtures/county_std.dwt, then use Plan Production to create view frames (1:500 plan, 1:500/1:50 profile) and sheets from template 'A1 Plan Profile' into out/sheets.dwg.

Platforms: win · Windows
Applications: Civil 3D
Interfaces: desk · Desktop GUI
GUI need · task setting: G3 · GUI-only
GUI need · ordinary access: CL · CLI-sufficient
Interaction primitives: click · Point & click nav · Pan/zoom/scroll type · Text & forms
Work product: WP03 · Visual layout
Conditions: licensed · Licensed pro app
Proposed difficulty: 3 / 5

Proposed verifier

DWG parse: profile view band set includes required bands; label set styles applied; view frame group covers full alignment with no gaps; sheets.dwg layouts count equals frames; viewport scales exact. Civil 3D .NET API, AutoLISP, .scr scripts and Dynamo for Civil 3D are disabled for the agent; the DWG and outputs must come from a Civil 3D session, checked against its command log.

Proposed partial credit

30% bands; 20% label sets; 25% view frames; 25% sheets

R07.06.01.01-T08 Design an at-grade T-intersection with curb returns and corridor regions

Original instruction

In fixtures/town_grid.dwg create an intersection between 'Main St' and 'Elm St' with 12 m curb returns, crowned primary road maintained, secondary road profile tied to primary edge, offset alignments for lane edges, and corridor regions generated by the Intersection wizard. Rebuild corridors with no errors and create the intersection surface.

Platforms: win · Windows
Applications: Civil 3D
Interfaces: desk · Desktop GUI
GUI need · task setting: G3 · GUI-only
GUI need · ordinary access: G2 · GUI-essential
Interaction primitives: click · Point & click geom · Precise geometry vis · Visual judgment
Work product: WP04 · 3D/spatial model
Conditions: licensed · Licensed pro app long · Long-horizon
Proposed difficulty: 5 / 5

Proposed verifier

Harness: intersection object exists; curb return radii 12±0.01; secondary profile meets primary edge elevation ±5 mm at tie-in; corridor rebuild 0 errors; surface without spikes (max slope <25%). Civil 3D .NET API, AutoLISP, .scr scripts and Dynamo for Civil 3D are disabled for the agent; the DWG and outputs must come from a Civil 3D session, checked against its command log.

Proposed partial credit

25% intersection created; 20% curb returns; 25% profile tie-in; 30% corridor clean & surface

R07.06.01.01-T09 Model a cul-de-sac bulb with widening and edge-of-pavement targets

Original instruction

At the end of 'Oak Ct' in fixtures/subdivision.dwg design a cul-de-sac: 15 m radius bulb, 6 m return radii, offset alignment/feature lines for edge of pavement, and corridor regions targeting them so the pavement surface follows a 2% fall to the gutter. Save and create surface 'FG-OakCt'.

Platforms: win · Windows
Applications: Civil 3D
Interfaces: desk · Desktop GUI
GUI need · task setting: G3 · GUI-only
GUI need · ordinary access: AP · API-sufficient
Interaction primitives: geom · Precise geometry click · Point & click vis · Visual judgment
Work product: WP04 · 3D/spatial model
Conditions: licensed · Licensed pro app
Proposed difficulty: 4 / 5

Proposed verifier

Harness: bulb radius 15±0.01, returns 6±0.01; corridor targets set to EOP geometry; sampled cross slopes 2±0.2%; surface continuous with no holes in bulb. Civil 3D .NET API, AutoLISP, .scr scripts and Dynamo for Civil 3D are disabled for the agent; the DWG and outputs must come from a Civil 3D session, checked against its command log.

Proposed partial credit

30% bulb geometry; 30% targets; 25% cross slopes; 15% surface

R07.06.01.01-T10 Generate a mass-haul diagram and find balance points along a corridor

Original instruction

For corridor 'Hwy7' in fixtures/hwy7.dwg create sample lines every 20 m, compute materials with shrink 0.85 / swell 1.20, create a mass haul diagram with 400 m free haul, and write balance-point stations and total overhaul (m³·km) to out/masshaul.json. Produce cross-section sheets for 0+000 to 1+000.

Platforms: win · Windows
Applications: Civil 3D
Interfaces: desk · Desktop GUI
GUI need · task setting: G3 · GUI-only
GUI need · ordinary access: CL · CLI-sufficient
Interaction primitives: click · Point & click type · Text & forms vis · Visual judgment
Work product: WP07 · Simulation result
Conditions: licensed · Licensed pro app
Proposed difficulty: 4 / 5

Proposed verifier

masshaul.json balance stations within 5 m and overhaul within 3% of reference; mass haul view object in DWG with 400 m free haul; ≥51 section views on sheets. Civil 3D .NET API, AutoLISP, .scr scripts and Dynamo for Civil 3D are disabled for the agent; the DWG and outputs must come from a Civil 3D session, checked against its command log.

Proposed partial credit

20% sample lines & materials; 40% balance points; 25% overhaul; 15% section sheets

R07.06.01.01-T11 Lay out horizontal geometry with civil design standards in OpenRoads

Original instruction

In OpenRoads Designer 2024 open fixtures/county_rd.dgn. Using Horizontal Geometry tools with design standard 'Rural 70 km/h', create alignment 'CR-12' from the two tie points through the corridor polygon, using arcs with spiral transitions, and ensure no design-standard warnings remain. Define it as the active horizontal geometry with stationing start 10+000.

Platforms: win · Windows
Applications: OpenRoads
Interfaces: desk · Desktop GUI
GUI need · task setting: G3 · GUI-only
GUI need · ordinary access: G2 · GUI-essential
Interaction primitives: geom · Precise geometry click · Point & click nav · Pan/zoom/scroll
Work product: WP04 · 3D/spatial model
Conditions: licensed · Licensed pro app
Proposed difficulty: 3 / 5

Proposed verifier

LandXML export: alignment within polygon; ties ±0.01 m; radii/spirals satisfy standard; start station 10+000; civil rule feature has standard attached and 0 warnings (grader parses DGN via OpenRoads batch). MicroStation/OpenRoads Python, VBA, key-in scripts and add-ins are disabled for the agent; writes to the DGN or out/ by any process other than OpenRoads Designer are flagged by a file audit log.

Proposed partial credit

30% geometry valid; 25% standard compliance; 20% ties & polygon; 25% stationing

R07.06.01.01-T12 Create and activate a vertical profile with design standards in OpenRoads

Original instruction

For alignment 'CR-12' in fixtures/county_rd_v2.dgn create a vertical profile from the existing terrain view, with grades ≤7%, crest K ≥23 and sag K ≥17 (70 km/h standard), tying into 154.20 at start and 149.85 at end. Set it active.

Platforms: win · Windows
Applications: OpenRoads
Interfaces: desk · Desktop GUI
GUI need · task setting: G3 · GUI-only
GUI need · ordinary access: G2 · GUI-essential
Interaction primitives: geom · Precise geometry click · Point & click vis · Visual judgment
Work product: WP04 · 3D/spatial model
Conditions: licensed · Licensed pro app
Proposed difficulty: 3 / 5

Proposed verifier

LandXML: active profile exists with tie elevations ±0.01; grades and K per type; 0 standard warnings. MicroStation/OpenRoads Python, VBA, key-in scripts and add-ins are disabled for the agent; writes to the DGN or out/ by any process other than OpenRoads Designer are flagged by a file audit log.

Proposed partial credit

25% tie-ins; 30% grades; 30% K-values; 15% active

R07.06.01.01-T13 Build an OpenRoads corridor with template drops and end conditions

Original instruction

In fixtures/county_rd_v3.dgn create corridor 'CR-12' using template 'Rural 2L Shoulder' from fixtures/templates.itl with drops every 10 m, a transition to 'Rural 2L Guardrail' between 10+400 and 10+520, and end conditions to existing terrain (cut 1:2, fill 1:3). Generate 3D model and earthwork volumes report.

Platforms: win · Windows
Applications: OpenRoads
Interfaces: desk · Desktop GUI
GUI need · task setting: G3 · GUI-only
GUI need · ordinary access: CL · CLI-sufficient
Interaction primitives: click · Point & click geom · Precise geometry vis · Visual judgment
Work product: WP04 · 3D/spatial model
Conditions: licensed · Licensed pro app
Proposed difficulty: 4 / 5

Proposed verifier

Harness reads corridor: template drops and transition stations exact; end condition slopes at sample sections; 3D mesh exists; cut/fill within 2% of reference. MicroStation/OpenRoads Python, VBA, key-in scripts and add-ins are disabled for the agent; writes to the DGN or out/ by any process other than OpenRoads Designer are flagged by a file audit log.

Proposed partial credit

25% corridor & drops; 25% transition; 20% end conditions; 30% volumes

R07.06.01.01-T14 Calculate superelevation sections and lanes in OpenRoads

Original instruction

For 'CR-12' in fixtures/county_rd_v3.dgn create superelevation sections and lanes, calculate with the AASHTO 2018 emax 8% preference file, assign to corridor 'CR-12' and export the superelevation report to out/se_report.xml.

Platforms: win · Windows
Applications: OpenRoads
Interfaces: desk · Desktop GUI
GUI need · task setting: G3 · GUI-only
GUI need · ordinary access: G2 · GUI-essential
Interaction primitives: click · Point & click type · Text & forms
Work product: WP04 · 3D/spatial model
Conditions: licensed · Licensed pro app
Proposed difficulty: 3 / 5

Proposed verifier

Report: full super rates and transition stations match reference ±0.1%/±1 m; corridor uses the superelevation; lanes defined for both sides. MicroStation/OpenRoads Python, VBA, key-in scripts and add-ins are disabled for the agent; writes to the DGN or out/ by any process other than OpenRoads Designer are flagged by a file audit log.

Proposed partial credit

25% sections/lanes; 45% calculated values; 30% assigned to corridor

R07.06.01.01-T15 Grade a parking lot with feature lines tying into a road corridor

Original instruction

In fixtures/parking.dwg grade the 60×40 m lot boundary with feature lines: 2% min / 5% max slopes, drain to the two inlets marked, edges tying into the corridor surface 'Main FG' along the access. Create grading surface 'LOT' and paste into a composite 'FG-ALL'.

Platforms: win · Windows
Applications: Civil 3D
Interfaces: desk · Desktop GUI
GUI need · task setting: G3 · GUI-only
GUI need · ordinary access: CL · CLI-sufficient
Interaction primitives: geom · Precise geometry click · Point & click vis · Visual judgment
Work product: WP04 · 3D/spatial model
Conditions: licensed · Licensed pro app
Proposed difficulty: 3 / 5

Proposed verifier

Sample LOT surface on 1 m grid: slopes 2-5%; flow paths terminate at inlets (D8 flow); edge elevations along access within 10 mm of corridor; composite surface contains both. Civil 3D .NET API, AutoLISP, .scr scripts and Dynamo for Civil 3D are disabled for the agent; the DWG and outputs must come from a Civil 3D session, checked against its command log.

Proposed partial credit

35% slope band; 30% drains to inlets; 20% tie-in; 15% composite surface

R07.06.01.01-T16 Control pair of T02: compute the vertical profile by script and write a station table

Original instruction

Control pair of T02. Without Civil 3D, write a Python script that reads the EG profile samples (input/main_st_eg.csv) and designs a PVI/vertical-curve profile meeting T02's limits, writing PVI list and FG elevations every 10 m to out/fg.csv and LandXML.

Platforms: lin · Linux mac · macOS win · Windows
Applications: Python
Interfaces: term · Terminal
GUI need · task setting: CL · CLI-sufficient
GUI need · ordinary access: CL · CLI-sufficient
Interaction primitives: code · Code & commands
Work product: WP04 · 3D/spatial model
Conditions: None declared
Proposed difficulty: 2 / 5

Proposed verifier

Same checks as T02 on the LandXML (tie-ins, grades, K, spacing, ±3 m band). Comparison with GUI result.

Proposed partial credit

20% tie-ins; 25% grades; 25% K-values; 30% spacing & band

R07.06.01.01-T17 Re-route an alignment around a protected tree zone and rebuild everything

Original instruction

A protected tree zone (polygon 'TPZ' in fixtures/school_link.dwg) now requires 5 m clearance from the road edge. Revise alignment 'School Link' horizontally (keep 40 km/h standard and tie points) and adjust profile 'FG' so design checks still pass, then rebuild the corridor and update cut/fill volumes to out/volumes.csv.

Platforms: win · Windows
Applications: Civil 3D
Interfaces: desk · Desktop GUI
GUI need · task setting: G3 · GUI-only
GUI need · ordinary access: G2 · GUI-essential
Interaction primitives: geom · Precise geometry drag · Drag & drop vis · Visual judgment
Work product: WP04 · 3D/spatial model
Conditions: licensed · Licensed pro app long · Long-horizon
Proposed difficulty: 5 / 5

Proposed verifier

Corridor edge offset ≥5 m from TPZ along entire length; tie points ±0.01; design checks 0 violations; profile limits per standard; corridor rebuilt (no out-of-date flag); volumes within 2% of grader recompute. Civil 3D .NET API, AutoLISP, .scr scripts and Dynamo for Civil 3D are disabled for the agent; the DWG and outputs must come from a Civil 3D session, checked against its command log.

Proposed partial credit

35% clearance achieved; 35% design checks & profile adjusted; 15% corridor rebuilt; 15% volumes

R07.06.01.01-T18 Check stopping sight distance on a crest and fix the vertical curve

Original instruction

Use Civil 3D's sight distance check on profile 'FG' of 'Hill Rd' (fixtures/hill_rd.dwg, 60 km/h, eye 1.08 m, object 0.60 m, SSD 85 m). One crest fails. Lengthen that vertical curve minimally so SSD is satisfied throughout and record the new K and length in out/ssd.txt.

Platforms: win · Windows
Applications: Civil 3D
Interfaces: desk · Desktop GUI
GUI need · task setting: G3 · GUI-only
GUI need · ordinary access: CL · CLI-sufficient
Interaction primitives: geom · Precise geometry click · Point & click vis · Visual judgment
Work product: WP04 · 3D/spatial model
Conditions: licensed · Licensed pro app
Proposed difficulty: 3 / 5

Proposed verifier

Profile: failing curve length increased to within 5% of minimal compliant length; other curves unchanged; grader SSD sweep passes; ssd.txt values match. Civil 3D .NET API, AutoLISP, .scr scripts and Dynamo for Civil 3D are disabled for the agent; the DWG and outputs must come from a Civil 3D session, checked against its command log.

Proposed partial credit

30% failing curve identified; 50% compliant near-minimal fix; 20% report

R07.06.01.01-T19 Report station and offset of 40 utility poles relative to an alignment

Original instruction

In fixtures/utility_survey.dwg, report the station and offset (left negative) of each of the 40 pole blocks 'UP' relative to alignment 'Route 9' and export them with pole IDs to out/poles.csv.

Platforms: win · Windows
Applications: Civil 3D
Interfaces: desk · Desktop GUI
GUI need · task setting: G3 · GUI-only
GUI need · ordinary access: AP · API-sufficient
Interaction primitives: click · Point & click type · Text & forms
Work product: WP12 · Answer/decision
Conditions: licensed · Licensed pro app
Proposed difficulty: 2 / 5

Proposed verifier

poles.csv 40 rows; station/offset within 0.01 m of reference; sign convention correct. Civil 3D .NET API, AutoLISP, .scr scripts and Dynamo for Civil 3D are disabled for the agent; the DWG and outputs must come from a Civil 3D session, checked against its command log.

Proposed partial credit

70% values correct (scaled); 20% sign convention; 10% format

R07.06.01.01-T20 Produce an earthwork volume report for an OpenRoads corridor

Original instruction

For corridor 'Access Rd' in fixtures/access_rd.dgn create cross sections every 25 m, compute end-area volumes for cut, fill and topsoil strip 0.2 m, and export the report to out/earthwork.csv.

Platforms: win · Windows
Applications: OpenRoads
Interfaces: desk · Desktop GUI
GUI need · task setting: G3 · GUI-only
GUI need · ordinary access: G2 · GUI-essential
Interaction primitives: click · Point & click type · Text & forms
Work product: WP07 · Simulation result
Conditions: licensed · Licensed pro app
Proposed difficulty: 3 / 5

Proposed verifier

earthwork.csv totals within 2% of reference; section interval 25 m; topsoil class included. MicroStation/OpenRoads Python, VBA, key-in scripts and add-ins are disabled for the agent; writes to the DGN or out/ by any process other than OpenRoads Designer are flagged by a file audit log.

Proposed partial credit

30% sections created; 50% volumes; 20% topsoil

Mapped research references

Existing benchmark-to-class links from the research catalog. They are not record-level annotations, executions or product endorsements.

Agents' Last Exam (ALE)

Road alignment, profile & corridor design

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Mapped research references

In this workflow family