 We're currently at an interstate 465 installing the sensor on the concrete pavement job using the sensor to measure the compression strength of the concrete. We're planning to use this to replace flexural testing and also time-dependent to the policy for opening traffic. This sensor is called a piezoelectric sensor. Piezoelectric is scientific effects which we can directly convert electrical energy into mechanical and vice versa. So by using this sensor the students will tie the sensor on the piece of the rebar and put it in the concrete. The concrete worker will pour in the concrete on top of the sensor. After one hour we will start to conduct the impedance analyzing. When the concrete is started we call hydration so the water will react with cementitious material and the grain size will get larger and larger and concrete will get harder. We can use the vibration wave to see the stiffness of the concrete. By measuring the force over the velocity which we call mechanical impedance we can understand the strength of the concrete at a certain time. So in this way what we did is we directly measured electrical signal rather than heavily conventional mechanical data. And every hour, every single hour we take a measurement until 12 hours and then we analyze the data, we get the predicted compression strength of the concrete and we get the feedback to the field engineer. Because of faster tracking construction schedule concrete often exposed to the traffic too early so which caused what we call premature failure so therefore we have to frequently repair the concrete. We are gathering this data and then we try to make a suggestions to the DOT and to help them to understand when will be the best time for the traffic opening and hopefully we can change the current policy and then can benefit our tech payers from the cost to end the traffic scheduling standpoint.