So, a detailed suggestion should include more detail such as the length, route map if applicable, locomotives, what's the services like and why it should be made. If it's a tsc route like the hanover sub, you could just rewrite what is on the steam page. You could even use wikipedia to create a post.
Route map Legend MP Trenton Subdivision CR Delair Branch 0.0 CP Park Eakins Oval I-676.svgUS 30.svg I-676 / US 30 SEPTA Regional Rail PA-3.svg PA 3 JFK Blvd. PA-3.svg PA 3 Market Street Chestnut Street Walnut Street South Street Harrisburg Subdivision I-76.svg I-76 3.3 Harrisburg Subdivision B&O Railroad Bridge over Schuylkill River Amtrak Northeast Corridor Wilmington/Newark Line Cobbs Creek Darby Creek SEPTA Route 11 US 13.svg US 13 SEPTA Route 102 PA-420.svg PA 420 I-476.svg I-476 PA-320.svg PA 320 PA-352.svg PA 352 Chester Chester Creek US 322.svg US 322 PA-452.svg PA 452 PA-491.svg PA 491 Pennsylvania Delaware border Elongated circle 92.svg DE 92 Elongated circle 3.svg DE 3 I-95.svg I-95 Ellipse sign 202.svg DE 202 I-95.svgUS 202.svg I-95 / US 202 Brandywine Creek Elongated circle 52.svg DE 52 Wilmington Elongated circle 48.svg DE 48 28.5 East Penn Railroad Elongated circle 2.svg DE 2 East Penn Railroad East Penn Railroad Ellipse sign 100.svg DE 100 Ellipse sign 141.svg DE 141 30.7 Wilmington & Western RR Elongated circle 62.svg DE 62 Red Clay Creek Elongated circle 7.svg DE 7 White Clay Creek Elongated circle 2.svgElongated circle 72.svg DE 2 / DE 72 Ellipse sign 896.svg DE 896 Ellipse sign 273.svg DE 273 Delaware Maryland border MD Route 277.svg MD 277 MD Route 213.svg MD 213 MD Route 545.svg MD 545 I-95.svg I-95 MD Route 272.svg MD 272 MD Route 222.svg MD 222 Perryville 57.7 Port Road Branch CSX Susquehanna River Bridge over Susquehanna River MD Route 155.svg MD 155 Havre de Grace MD Route 22.svg MD 22 MD Route 132.svg MD 132 Aberdeen MD Route 7.svg MD 7 MD Route 543.svg MD 543 MD Route 24.svg MD 24 MD Route 152.svg MD 152 MD Route 43.svg MD 43 US 40.svg US 40 I-695.svg I-695 I-95.svg I-95 90.3 Baltimore Terminal Sub. Route map Legend MP Trenton Subdivision CR Delair Branch 0.0 CP Park Eakins Oval I-676.svgUS 30.svg I-676 / US 30 SEPTA Regional Rail PA-3.svg PA 3 JFK Blvd. PA-3.svg PA 3 Market Street Chestnut Street Walnut Street South Street Harrisburg Subdivision I-76.svg I-76 3.3 Harrisburg Subdivision B&O Railroad Bridge over Schuylkill River Amtrak Northeast Corridor Wilmington/Newark Line Cobbs Creek Darby Creek SEPTA Route 11 US 13.svg US 13 SEPTA Route 102 PA-420.svg PA 420 I-476.svg I-476 PA-320.svg PA 320 PA-352.svg PA 352 Chester Chester Creek US 322.svg US 322 PA-452.svg PA 452 PA-491.svg PA 491 Pennsylvania Delaware border Elongated circle 92.svg DE 92 Elongated circle 3.svg DE 3 I-95.svg I-95 Ellipse sign 202.svg DE 202 I-95.svgUS 202.svg I-95 / US 202 Brandywine Creek Elongated circle 52.svg DE 52 Wilmington Elongated circle 48.svg DE 48 28.5 East Penn Railroad Elongated circle 2.svg DE 2 East Penn Railroad East Penn Railroad Ellipse sign 100.svg DE 100 Ellipse sign 141.svg DE 141 30.7 Wilmington & Western RR Elongated circle 62.svg DE 62 Red Clay Creek Elongated circle 7.svg DE 7 White Clay Creek Elongated circle 2.svgElongated circle 72.svg DE 2 / DE 72 Ellipse sign 896.svg DE 896 Ellipse sign 273.svg DE 273 Delaware Maryland border MD Route 277.svg MD 277 MD Route 213.svg MD 213 MD Route 545.svg MD 545 I-95.svg I-95 MD Route 272.svg MD 272 MD Route 222.svg MD 222 Perryville 57.7 Port Road Branch CSX Susquehanna River Bridge over Susquehanna River MD Route 155.svg MD 155 Havre de Grace MD Route 22.svg MD 22 MD Route 132.svg MD 132 Aberdeen MD Route 7.svg MD 7 MD Route 543.svg MD 543 MD Route 24.svg MD 24 MD Route 152.svg MD 152 MD Route 43.svg MD 43 US 40.svg US 40 I-695.svg I-695 I-95.svg I-95 90.3 Baltimore Terminal Sub.
The Philadelphia Subdivision is a railroad line owned and operated by CSX Transportation in the U.S. states of Pennsylvania, Delaware, and Maryland. The line runs from Philadelphia, Pennsylvania, southwest to Baltimore, Maryland, along a former Baltimore and Ohio Railroad (B&O) line.[1]