How would the dimensions of newly constructed Tanzania standard gauge rail line change during the summer and winter days?

The dimensions of the newly constructed Tanzania standard gauge rail line would not change significantly during the summer and winter days. The rail line would be designed and constructed to withstand changes in temperature and weather conditions without significant expansion or contraction. However, minor changes in dimensions may occur due to thermal expansion and contraction, but these would be minimal and within the tolerances specified for the rail line construction.