I want to know the answer to the following question:
What is a safety hazard to track workers?
All the background I'm provided with is that "Disadvantages of electric traction include high capital costs that may be uneconomic on lightly trafficked routes; a relative lack of flexibility since electric trains need electrified tracks or onboard supercapacitors and charging infrastructure at stations; and a vulnerability to power interruptions.". Is that enough to answer the question?