A RISE of 25.3 per cent in spending on transport-related projects lifted the total value of Hong Kong construction last year to $89.2 billion. A report released yesterday by the Census and Statistics Department said that represented an 18.4 per cent increase over 1993. Residential projects dominated construction figures but rose only 6.4 per cent last year. Commercial projects were the third largest group, increasing 21.2 per cent. Both public and private contractors were much busier last year compared with 1993. The report found that the gross value of projects by private contractors rose by 22.9 per cent last year. Public sector contractors also notched an increase, of 10.9 per cent, in the value of their projects last year. The gross value of construction work performed by general contractors at locations other than construction sites rose 16.3 per cent. The value of electrical and mechanical works performed by licensed contractors increased by 30.5 per cent. Comparing the fourth quarter of last year with the fourth quarter of 1993, the gross value of work by main contractors increased by 12.1 per cent. Compared with the third quarter of 1994, the gross value of construction work by main contractors in the fourth quarter rose by 7.8 per cent.