Road illuminance visualized.
Calculate average, minimum and uniformity illuminance on the road for a row of luminaires. Compare against NMX-J-307-ANCE and EN 13201 requirements and watch it on an interactive 3D scene before going out to measure.
- No signup
- Free
- NMX-J-307 / EN 13201
- 3D visualization
Your project
Define the road geometry and the luminaire. The calculator solves the illuminance on a 11×31 grid over the road.
Comparison against the selected standard's requirements. Green = passes, yellow = borderline, red = fails.
Interactive 3D scene
Rendered street with poles, luminaires and light cones. Drag to rotate, scroll to zoom.
Lux map on the road
Horizontal illuminance grid (11 × 31 points). Green ≥ target, yellow borderline, red below minimum.
Transverse profiles
Illuminance across the road for 3 longitudinal positions between consecutive poles.
Minimum values for the selected road type.
| Class | Application | Ē min | Uo min |
|---|
- This calculation uses a simplified angular distribution per IES optic type (II/III/IV/VS) and sums contributions from 3 neighboring poles at each grid point. Valid for quick project evaluation; it does not replace a formal photometric study with .IES files.
- Minimum illuminance (Emin) is the lowest value on the calculation grid; in practice there can be darker points at extreme zones. For final design, increase MF by 5–10%.
- Uniformity Uo ≥ 0.40 is the international standard (EN 13201) for vehicular roads. NMX-J-307-ANCE allows Uo ≥ 0.25 in residential roads and ≥ 0.30 in collectors.
- Maintenance factor depends on environment: 0.80 clean, 0.70 industrial, 0.60 very polluted. A scheduled cleaning cycle keeps MF close to design value.
- For bilateral arrangements (staggered or opposite), the calculation uses two opposite rows at half the indicated spacing, assuming a centered vehicle lane.
By city
Pre-computed calculation for 12 strategic Mexican cities with a residential road baseline: 100 W LED luminaire (14000 lm), Type III optic, 9 m mounting height, 30 m spacing, 9 m road width, MF 0.75.
Need a formal calculation for your project?
If the project is critical, message us with the geometry and candidate luminaires. We deliver a formal photometric study with .IES files and isoline plans.