The speed limits are due to numerous level crossings with substandard sighting distances due in part vertical and horizontal curvature. Absolutely no discretion or exemptions are allowed as this is considered a new route.
The line was never built for passenger services and combined with a very boggy foundation has serious restrictions.
The line was reopened on the cheap to keep politicians happy, the consultants report looked at basically a new line from Limerick to Oranmore but came back at 600 million to 1 billion depending on spec/route.
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