NEW ADVANCES IMPROVE LASERS' VALUE

Use of lasers can offer construction contractors many benefits, but in the past its roadway applications have been limited. However, new technologies may solidify the laser's place in construction and make it a more valuable tool for the road builder. A sonic sensor device can be mounted to pavers or graders to improve their performance. These devices bounce sound waves off of objects, such as a stringline or curb. When the sound pulse returns to the sensor, the distance to the reference point is calculated. In addition to the sonic devices, a new laser tracer can be modified for use for machine control. The problem has been to provide three-dimensional control. However, systems that can do this are being introduced to the industry. The major benefit of this system is the elimination of grade staking and checking; the tracking laser transmits the grade information directly to the equipment, providing automatic grade control.