On the near West Side, try Father Caruso Dr. between W. 65th and W. 72nd Sts. North of Detroit Ave. This is adjacent to the Lakefront Line (NS).
Lakefront Area, North End of W. 9th St. (the Bridge is closed off) or along Front St. Again, NS
On the near East Side, try the CWRU / Univ. Hospitals area at Cornell
Rd. CSX, NS (x-NKP), and RTA Red Line
On the far East Side, E. 305th St. (Wickliffe / Willowick) or E. 361st St (aka: Biedler Rd.) (Willoughby / Eastlake). NS (x-NKP) and CSX are parallel and adjacent.
On the far Southeast side, Glendale and Grace Sts. in Bedford (NS)
West of Berea, Olmstead Falls has sites at Columbia Rd. (old WestView) for CSX and at the Depot 1 block west of Columbia Rd. for NS.
All of these are public sites, adequate parking, and no trespassing involved.