Okay, let’s tackle this. So David Rutherford has 19 years of experience in rail safety and signal consulting, which is a specialized field. His experience spans 19 years, with a duration of 19 years at General Railway Signal and 19 years at Rail Safety Consulting, LLC. The location is Rochester, New York, which is a mid-sized city in the US. Considering the industry demand for rail safety experts and his level of experience, I estimate his hourly rate to be around $125. This is lower than the average salary for engineers in the US, but rail safety is a specialized field with lower demand, so rates can be lower. Some rail safety experts with similar experience can charge $150-$200 per hour, but David’s experience and location suggest a lower rate.