Determining the Maximum Safe Speed on a Farm Road/Railroad Crossing. A two-lane road crosses an at-grade (i.e. zero grade) single railroad track at 90 degrees. Determine i. What maximum speed you will recommend to be posted on the road for vehicles to safely cross the tracks when an approaching train is observed by a driver:
Determining the Maximum Safe Speed on a Farm Road/Railroad Crossing. A two-lane road crosses an at-grade (i.e. zero grade) single railroad track at 90 degrees. Determine i. What maximum speed you will recommend to be posted on the road for vehicles to safely cross the tracks when an approaching train is observed by a driver:
Chapter2: Loads On Structures
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Transportation Engineering
Transcribed Image Text:Determining the Maximum Safe Speed on a Farm Road/Railroad
Crossing.
A two-lane road crosses an at-grade (i.e. zero grade) single railroad track at 90
degrees. Determine
i.
What maximum speed you will recommend to be posted on the road for
vehicles to safely cross the tracks when an approaching train is observed by
a driver;
The maximum distance on the road from the track that the driver should
ii.
first observe the train.
The following conditions exist:
(i) Speed of trains crossing the highway is 130 km/h
(ii) Design vehicle is a passenger car (assume L= 5.7m)
(iii) Sight distance on railway tracks when the driver of the vehicle on the
road observes a train 245 m.
(iv) Width of track for a single railroad track is 1.5m
(v) Assume a perception-reaction time of 2.5 sec.
(vi) Assume a distance from the driver to the front of vehicle as 2.4m
(vii) The distance between the tracks and the stopline is 4.5m
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