| Infrastructure | Lay-out, planning and design | Silborn (2013), and Motraghi (2013) |
| Technical: Signalling and power systems | Sakalys and Palšaitis (2006), Reis et al. (2012) |
| Data and information | Information exchange | Bask et al. (2001), Dullaert et al. (2009), Reis et al. (2012), Sys and Vanelslander (2011), Stölzle et al. (2009), Silborn (2013) |
| Documents | Motraghi (2013), and Marinov (2009) |
| Tracking units | Motraghi (2013) |
| Equipment | Vehicles/rolling-stock | Janic (2001), Bontekoning and Priemus (2004), Tsamboulas et al. (2007), Marinov (2009) |
| Loading units | Bask et al. (2001), Janic (2001), Van de Lande and Henriques (2006), Tsamboulas et al. (2007), Konings (2008), Marinov (2009), Silborn (2013) |
| Packaging | Bask et al. (2001) |
| Security and safety | Security | Silborn (2013), Sakalys and Palšaitis (2006), Marinov (2009), Reis et al. (2012) |
| Safety | Eisenkopf et al. (2006) |
| Services | Overall reliability and transit times | Silborn (2013), Sakalys and Palšaitis (2006) |
| Terminal | Planning, design, processes, services, systems, equipment | Van de Lande and Henriques (2006), Silborn (2013) |
| Contracts | Common contracts | Reis et al. (2012) |
| Liability rules | Marinov (2009), Van de Lande and Henriques (2006) |
| Pricing | Infrastructure duties/taxes | Stölzle et al. (2009) |
| Labour | Working conditions | Stölzle et al. (2009) |
| Routines | Bask et al. (2001) |
| Training | Van de Lande and Henriques (2006) |
| Environmental | Noise | Reis et al. (2012) |