source: [word=years | lemma="15"] [□=□] □ □
destination: [word=years | lemma="15"] [lemma=□] □ □
spec: A second challenge we continue to face in the final regulations is the case review process required in the on-site review . Significant increases in freight traffic over the next 10 to 15 years are forecasted , and the railroad industry 's ability to meet future demand is largely uncertain .