Temporal characteristics of the spring amphibian migration and the use of the tunnel-barrier system along the Hont and Parassapuszta section of the main road No. 2. between 2009 and 2011

Published source details Mechura T., Gémesi D, Szövényi G. & Puky M. (2012) A tavaszi kétéltű-vándorlás időbeli jellegzetességei és a közúti kétéltűvédelmi rendszer működése a 2. sz. főút Hont–Parassapuszta szakaszán 2009 és 2011 között. Állattani Közlemények, 97, 77–84.
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This study is summarised as evidence for the following.

	Action	Category
	Install culverts or tunnels as road crossings Action Link

Install culverts or tunnels as road crossings

A before-and-after study in 2006–2011 of a tunnel with barrier wall along a road in Hungary (Mechura et al. 2012) found that up to 15% of migrating amphibians used the tunnels but road deaths did not decrease significantly. During the two years after construction, there was no significant reduction in road deaths as fewer than 1% of migrating amphibians used the tunnels. Following maintenance, over the next three years 9–15% of the amphibians used the tunnels. However, over 10,000 amphibians died on the road section each year in 2009–2011 even although toad rescue was also carried out by volunteers. Seven frog and toad species and two newt species were recorded dead along the road. Almost 90% were common toads Bufo bufo. In 2006 a tunnel with barrier system was constructed for amphibians between Hont and Parassapuszta. Maintenance was undertaken in spring 2009 and in 2010 and 2011.