Lifts, escalators, ramps for the disabled, and access control measures to keep trespassers away.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/mumbai-brace-state-art-monorail-station-wadala
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/daily-news-analysis-mumbai
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/mono-rail
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/transport
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/mumbai
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/maharashtra