This research studied about mixing material to make the cement block with corncob to get a lighter weight but still have industry standard strength for non-bearing concrete block (TIS. 58-2530). Normally general cement block use 1:2 ratio by weight of cement and flour rock respectively The corncob were ground through a standard 3/8 inches sieve and were used to replace the flour rock using a ratio of 0% 3% 5% 7% and 9% by weight and setting the ratio of water per cement as 36% 40% 44% and 48% by weight. The compressive strength of 7x19x39 centimeters cement block mixed with corncob was tested at the age of 28 days. The test results to make cement block mixed with corncob showed the suitable ratio 3% corncob using instead of flour rock. The average compressive strength of the blocks was 20.09 kg/cm2 and the percent of water absorption was 12.23 % which past the Thai Industry Standard (TIS 58-2530)

The urban and economic areas in Bangkok at present are grown rapidly. The travelling and road usage are increased which make the traffic jam problem happened and result the economics and social loss. Accordingly it is necessary to study the state of traffic and transportation to make the planning and define the ways to solve the problem via physical conditions or light signals. Not only the current problem s but also suggest the way to solve the problem which may happen in the future. This research studied about traffic volumes and physical conditions at Khae Rai Intersection. The real traffic is simulated by NETSIM program from the traffic volumes and physical conditions data which are collected to examine and analyze the effects from the traffic and suggest the ways to solve the problems. The results showed that NETSIM program can be used for simulating before and after traffic condition at Khae Rai Intersection. The conclusion showd the better traffic condition after it was solved by light signals and physical conditions