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task library
built templatesignal-timingwith-tool

Pedestrian Clearance Time

Calculates the pedestrian clearance interval for a signalised crossing from crosswalk length and assumed walking speed. The deterministic relation divides crossing distance by walking speed and reports both exact and whole-second rounded flashing clearance time.

inputs

2 fields

context

3 archetypes

engine

with-tool

outputs

2 scored fields

contract fields

Parameter Map

2 inputs to 2 scored outputs

  • crosswalk_length_m

    float

    Crosswalk length

    3 to 60m

  • walking_speed_m_s

    floathidden in hard

    Design pedestrian walking speed

    0.6 to 1.8m/s
pedestrian_clearance_time_stol 0.03

Calculated pedestrian clearance time

pedestrian_clearance_rounded_stol 0.01

Clearance time rounded up to a whole second

visibility contract

Difficulty Ladder

all_giveneasy

Short crossing with all inputs visible

all fields visible
all_givenmedium

Urban or arterial crossing

all fields visible
partialhard

Walking speed hidden in accessibility context

walking_speed_m_s

scenario bands

Archetype Atlas

short_crossing

2 contexts

Short urban pedestrian crossing

crosswalk_length_m3 to 12
walking_speed_m_s1 to 1.5

urban-intersection / local-street

wide_crossing

2 contexts

Wide arterial or staged crossing

crosswalk_length_m12 to 35
walking_speed_m_s0.9 to 1.3

arterial-road / transport-interchange

accessible_crossing

2 contexts

Accessible design crossing with slower walking speed

crosswalk_length_m8 to 35
walking_speed_m_s0.6 to 1

hospital-precinct / aged-care-frontage

rendered task

Generation Preview

hospital-precinct-accessible-crossing-preview

difficulty
hard
visibility
partial
archetype
accessible_crossing
site context
hospital-precinct
instruction excerptpedestrian-clearance-time_calc.py

visible fields

  • crosswalk_length_m8 to 35 m

withheld schema

walking_speed_m_spedestrian_clearance_time_spedestrian_clearance_rounded_s
Accessible design crossing with slower walking speed. hospital-precinct. Required outputs: pedestrian_clearance_time_s, pedestrian_clearance_rounded_s