Hi,
We are struggling with sight visibiloty analysis, because currently available methods covers only some of regional standards, like for example Italian, Australian, French or AASHTO. Equation used for that strandards is probably hardcoded somewhere. Table method doesn't met our needs in Poland. Is it possible to add another method that uses user predefined equation instead of table?
Just to complete the idea regarding Safety requirements – minimum visibility stopping distance:
The distance is determined from the formula:
Lz=88,4+"-126+1,81V-1,05i" /("1-0,404ln(V)+1,51" e^(i/100) )
where:
Lz: minimum required viewing distance per stop [m]
V: design speed or permissible speed if lower [km/h]
i: average longitudinal slope of the lane Lz [%]
Scope of application of the formula: V= {30, 140} and i = {-10%, +10%}