Hi, How about "settlement"? Then look at Human and structural elements in that settlement. Human settlement may include social and economic while structural may include buildings, roads, bridges etc. Just suggestions for you to incubate your idea.
Urban accessibility and mobility of transportation system assessment can be an interesting topic that includes different infrastructures and urban planning issues and challenges. Try it!
Sustainable cities and forest development. Sustainable cities where residents, businesses, hospital, schools, recreational facilities etc are built in one area so that transport is minimised. People can walk or cycle to work or school. The importance of forest should be considered to provide opportunities for flora and fauna and to control climate change.
Keeping today's scenario like climate change... More production with less area... New technology based infrastructures.. Recreational facilities.. Hi tech hospitals n oll into consideration
From this u can get a single title or theme for ur thesis...