RCOC Driveway Layout Checker

Lay out driveway center stations along a parcel frontage and check common RCOC size, spacing, frontage, corner-offset, and residential sight-distance rules.

Quick-reference only: Based on the August 6, 2026 “Driveway Permit — TS — ENG — RCOC” staff reference. Results do not replace a permit review or the complete RCOC Permit Rules, Specifications, and Guidelines.

1. Parcel and access type

Driveway design

Road frontage, F (ft)

Number of driveways

Two-driveway arrangement

2. Driveway geometry

Typical values are loaded. Values elsewhere in a permitted range still require RCOC approval.

Intersecting angle, A (degrees)

Entering radius, C (ft) — all driveways

Exiting radius, D (ft) — all driveways

Taper depth, Q (ft) — all driveways

Driveway stations and widths

Station is the driveway center measured from the left property line along the road frontage.

3. Location checks

Residential sight distance

Posted speed limit

Available sight distance (ft)

Rule 6.2.3 measurement: 10 ft from the traveled edge on gravel or pavement edge on paved roads, using 3.5-ft eye and object heights.

This driveway layout is adjacent to an intersection

Radius point of curvature to intersecting road centerline (ft)

Radius point of curvature to future cross-street ROW line (ft)

Preliminary result

Checking layout…

Scaled to frontage

Parcel sketch

Concept sketch only. Opening limits use R = B + C + D and assume C is left of center and D is right of center.

Calculated values

Layout numbers

Permit quick-reference

Rule checks

Pass Review Revise

RCOC may require changes based on sight distance, traffic, roadway operations, drainage, the complete permit rules, and site-specific conditions. Commercial sight distance and specialized designs require the applicable RCOC guidance.