Challenger 300
Flight Crew Air Transport Pilot (ATP)
Distraction
Deviation / Discrepancy - Procedural Clearance; Ground Incursion Runway
Air Traffic Control Issued New Clearance
Airport; Human Factors
We were given clearance to taxi to Runway 28L at HWD via Taxiway A and A1. Approaching the end of the taxiway a sign to left regarding noise abatement procedures caught my attention. With the layout of the taxiway paralleling the runway; and runup area to the left I did not notice the hold short line. I passed the hold short line; by my estimate; by a few feet with the nose of the plane. Upon noticing my error I contacted Tower and told them what happened. I was given instructions to taxi onto the runway and turn left on Taxiway D; left on Z and hold short. We complied with these instructions. Do not allow distractions such as a sign for noise abatement located near hold short lines to take your attention off the primary duty of taxiing the airplane.
CL300 pilot reports crossing the hold line for Runway 28L on Taxiway A while distracted by attention to a noise abatement sign in the same area.