Road Pdi Calculation

Calculates Power Density Index and specific power density for a road lighting installation from total system power, maintained illuminance, and illuminated area.

inputs

3 fields

context

2 archetypes

engine

with-tool

outputs

2 scored fields

contract fields

Parameter Map

3 inputs to 2 scored outputs

total_system_power_w
float
Total installed road lighting system power
100 to 200000W
maintained_illuminance_lux
float
Maintained average illuminance over the lit area
1 to 50lux
illuminated_area_m2
floathidden in hard
Illuminated road or pathway area
100 to 100000m2

power_density_index_w_per_lux_m2tol 0.03

Power Density Index in watts per lux per square metre

specific_power_density_w_per_m2tol 0.03

Installed power divided by illuminated area

visibility contract

Difficulty Ladder

all_giveneasy

Local road with all values visible

all fields visible

all_givenmedium

Road lighting section selected from local or arterial cases

all fields visible

partialhard

Arterial road with illuminated area embedded in context

illuminated_area_m2

scenario bands

Archetype Atlas

local_road

2 contexts

Local road lighting section

total_system_power_w500 to 5000

maintained_illuminance_lux3 to 15

illuminated_area_m2300 to 4000

local-road / pedestrian-route

arterial_road

2 contexts

Arterial road lighting section

total_system_power_w5000 to 60000

maintained_illuminance_lux10 to 35

illuminated_area_m23000 to 40000

arterial-road / transport-corridor

rendered task

Generation Preview

arterial-road-arterial-road-preview

difficulty: hard
visibility: partial
archetype: arterial_road
site context: arterial-road

instruction excerptroad-pdi-calculation_calc.py

visible fields

total_system_power_w5000 to 60000 W
maintained_illuminance_lux10 to 35 lux

withheld schema

illuminated_area_m2power_density_index_w_per_lux_m2specific_power_density_w_per_m2

Arterial road lighting section. arterial-road. Required outputs: power_density_index_w_per_lux_m2, specific_power_density_w_per_m2