LIVEdataset releasetasks 552models 18last submission … · built …
task library
built templatebraking-systemswith-tool

Braking Distance

Calculates train stopping distance under constant deceleration from train mass, initial speed, brake effort, adhesion limit, and track gradient. The template caps braking effort by wheel-rail adhesion and reports net deceleration, stopping distance, and stopping time.

inputs

5 fields

context

2 archetypes

engine

with-tool

outputs

4 scored fields

contract fields

Parameter Map

5 inputs to 4 scored outputs

  • train_mass_t

    float

    Train mass

    5 to 2000t

  • initial_speed_km_h

    float

    Initial speed before braking

    5 to 200km/h

  • brake_effort_kn

    float

    Available braking effort

    1 to 5000kN

  • adhesion_coefficient

    float

    Wheel-rail adhesion coefficient

    0.03 to 0.35

  • track_gradient_pct

    float

    Track gradient, positive for downhill in braking direction

    -5 to 5%
adhesion_limited_brake_effort_kntol 0.03

Effective brake effort after adhesion limit

net_deceleration_m_s2tol 0.03

Net braking deceleration

stopping_distance_mtol 0.03

Stopping distance

stopping_time_stol 0.03

Stopping time

visibility contract

Difficulty Ladder

all_giveneasy

All parameters given for light rail braking

all fields visible
all_givenmedium

All parameters given across passenger and freight braking cases

all fields visible
all_givenhard

All parameters given for heavy freight braking cases

all fields visible

scenario bands

Archetype Atlas

light_rail_vehicle

2 contexts

Light rail vehicle braking on urban alignment

train_mass_t30 to 120
initial_speed_km_h20 to 80
brake_effort_kn80 to 600
adhesion_coefficient0.08 to 0.2

urban-light-rail / depot-approach-track

heavy_freight_train

2 contexts

Heavy freight train braking on mainline track

train_mass_t500 to 1800
initial_speed_km_h40 to 120
brake_effort_kn800 to 4500
adhesion_coefficient0.06 to 0.18

regional-mainline / freight-terminal-approach

rendered task

Generation Preview

regional-mainline-heavy-freight-train-preview

difficulty
hard
visibility
all_given
archetype
heavy_freight_train
site context
regional-mainline
instruction excerptbraking-distance_calc.py

visible fields

  • train_mass_t500 to 1800 t
  • initial_speed_km_h40 to 120 km/h
  • brake_effort_kn800 to 4500 kN
  • adhesion_coefficient0.06 to 0.18
  • track_gradient_pct-1 to 3 %

withheld schema

adhesion_limited_brake_effort_knnet_deceleration_m_s2stopping_distance_mstopping_time_s
Heavy freight train braking on mainline track. regional-mainline. Required outputs: adhesion_limited_brake_effort_kn, net_deceleration_m_s2, stopping_distance_m, stopping_time_s