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task library
built templatelevel-crossingswith-tool

Warning Time Calculation

Calculates total level crossing warning time by summing minimum road-user warning time, clearance time, barrier lowering time, and system delay. The template converts maximum train speed to m/s and computes the required strike-in detection distance.

inputs

5 fields

context

2 archetypes

engine

with-tool

outputs

4 scored fields

contract fields

Parameter Map

5 inputs to 4 scored outputs

  • maximum_train_speed_kmh

    float

    Maximum train speed

    5 to 200km/h

  • minimum_warning_time_s

    float

    Minimum road-user warning time

    5 to 120s

  • road_user_clearance_time_s

    float

    Road user clearance time

    0 to 60s

  • barrier_lowering_time_s

    float

    Barrier lowering or equipment operating time

    0 to 30s

  • system_delay_s

    floathidden in hard

    Signal processing and system delay

    0 to 20s
maximum_train_speed_m_stol 0.01

Maximum train speed converted to m/s

total_warning_time_stol 0.03

Total warning time used for strike-in

strike_in_distance_mtol 0.03

Strike-in detection distance

minimum_warning_margin_stol 0.03

Additional time above the minimum warning time

visibility contract

Difficulty Ladder

all_giveneasy

Low-speed crossing with all timing values visible

all fields visible
all_givenmedium

Low-speed or mainline crossing

all fields visible
partialhard

System delay hidden in signalling context

system_delay_s

scenario bands

Archetype Atlas

low_speed_crossing

2 contexts

Low-speed urban or yard crossing

maximum_train_speed_kmh20 to 60
minimum_warning_time_s20 to 35
road_user_clearance_time_s3 to 10
barrier_lowering_time_s0 to 8

urban-crossing / yard-access

mainline_crossing

2 contexts

Mainline level crossing with active controls

maximum_train_speed_kmh60 to 160
minimum_warning_time_s20 to 45
road_user_clearance_time_s5 to 15
barrier_lowering_time_s5 to 12

regional-mainline / suburban-mainline

rendered task

Generation Preview

regional-mainline-mainline-crossing-preview

difficulty
hard
visibility
partial
archetype
mainline_crossing
site context
regional-mainline
instruction excerptwarning-time-calculation_calc.py

visible fields

  • maximum_train_speed_kmh60 to 160 km/h
  • minimum_warning_time_s20 to 45 s
  • road_user_clearance_time_s5 to 15 s
  • barrier_lowering_time_s5 to 12 s

withheld schema

system_delay_smaximum_train_speed_m_stotal_warning_time_sstrike_in_distance_mminimum_warning_margin_s
Mainline level crossing with active controls. regional-mainline. Required outputs: maximum_train_speed_m_s, total_warning_time_s, strike_in_distance_m, minimum_warning_margin_s