Project team may consist of ;
1 or 2 students if you are working on structural analysis as u usually work on softwares.
3 – 4 students if your project is on fluid mechanics or environmental engineering or geotechnical engineering
4–5(rarely,on the scale of the project ) students working on transportation engineering or surveing.
So no.of students ranges from
1 to 4 usually
1 to 5 rarely.