According to Japanese Railway standards prototype minimum curve radii is 160 m whereas at turnouts is 100 m. So I should use scaled minimums of 1837 mm and 1148 mm respectively. However, while I can use flex track on main line, there are only Tillig EW3 turnouts available on the market with 984 mm radii, so I need to use those instead of 1148 mm. Also minimum curve radii at stations should be 400 m or 300 m if rolling stock length is less than 18 m, which are 4592 mm, 3444 mm and 225 mm respectively. Since
Mo 204 prototype length is exactly 18 m, and
KiHa 23,
KiHa 53 and
KiHa 40 lengths are longer, then if I make station curve radii 3444 mm, I would not be able to operate KiHa rolling stock with curved stations. Fortunately, there is only single curved station
Nii station on Iga line.
Prototype clearance between rolling stock and structures should be 400 mm or 200 mm in case there is no possibility for passengers to extend from the windows, model 5 mm and 3 mm. Prototype clearance to platform should be 50 mm, model 1 mm. Clearance in curves should be calculated according to the formula provided in the JRS.
Formation (ballast) width should be 2.75 m, +0.5 m in curves or +0.6 m in places where workers can find shelter, which are model 32 mm, 6 mm and 7 mm. On the ballastless bridges shelter bays should be located every 50 m, model 574 mm.
Distance between parallel track centers is rolling stock width +600 mm, or +400 mm if there is no possibility for passengers to extend out of the windows, which are model 8 mm and 5 mm.
Anti-derailing rail should be used in curves, on ballastless bridges, at level crossings and in other places where derailment probability is high.
Thickness of the ballast bed should be 100 - 150 mm for low traffic passenger lines with speeds 50 - 90 km/h, which is 1 - 2 mm.
Clearance posts, distance posts and curve posts should be installed as wayside posts.
Effective length of halts and passing tracks at stations should accommodate the longest train.
The length of the platforms should be at least the full length of the train.
Width of the double sided platform is at least 3 m in the center and 2 m at ends. Width of single sided platform is 2 m in the center and 1.5 m at ends. These are model 34 mm, 23 mm and 17 mm.
Platform side to column or other structure clearance is at least 1 m. Clearance to overbridge entrance is 1.5 m. Which are model 11 mm and 17 mm.
Other than track sides of the platform should be fenced.
Platform access width should be not less than 1.5 m. Stairs should have landings every 3 m of height. Which are model 17 mm and 34 mm.
Height clearance above the rail top on electrified railway should be at 5 m as a standard, but not less than 4.4 m for DC and not less than 4.8 m at crossings (model 63 mm, 55 mm and 60 mm). Each clearance should allow 400 mm between wire and rolling stock with current collector folded (model 5 mm). Protection beam at crossing should be 30-50 cm below wire height (model 4 - 6 mm).
Height of feeder wires should not exceed 5.5 m above the rails (model 69 mm).
Clearance between platform top and footpaths and feeder wires should be not less than 3.5 m (model 40 mm).
Interval of catenary droppers should be 5 m (model 57 mm).
Deviation of feeder wire should be no more than 250 mm from the center of the track (model 3 mm).
Maximum distance between catenary system support points is 60 m (model 689 mm).
Time period between crossing interrupt activation and train arrival should be 15-20 seconds.
Time period between start of warning at crossing and train arrival should be 20-30 seconds.
Deceleration speed should be no less than 3.1 km/h/s for speeds 70-110 km/h and no less than 3.4 km/h/s for speeds below 70 km/h.
Rolling stock should stop within 14 m from speed of 35 km/h (model 175 mm and 121.5 mm/s).