Skywalk, enclosed pedestrian crossings suggested.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/monorail-help-pedestrians-too
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/hindu-thiruvananthapuram
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/pedestrians
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/kerala
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/mono-rail
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/transport
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/urban-transport