Curved diamonds are allowed as the AREMA are recommended standards and cannot provide guidance in every instance. Every diamond (track crossing) is custom made. The process is to provide crossing geometery (intersection information) and require the manufacture ...

David is so correct. We always try to avoid curves anywhere we can, especially in special trackwork. ------------------------------ Mitchell Alderman PE Senior Professional Engineer Pacific Railway Enterprises, Inc. Riverside CA (951) 541-3291 ---- ...

Overall, the practice is not to recommend diamonds with one or both tracks being in a curve. Practice has found that if there is a way to avoid the curve, or even create a "flat spot" in your curve, the curved diamond can be avoided. As you mention ...

Hi, LIRR do have curved diamond with weldless boltless center frogs. It is not on the reverse curve though. It is not completely based on AREMA recommendations but very close to it. Hiren Confidentiality Note: This e-mail, ...

Farhad, I have used the AREMA Portfolio plans as a basis of design for freight and transit and for joint-use curved diamonds. I just finished one for a double-track freight/trolley junction with one leg of the diamond being curved. It will depend on ...