Interface bumps between bridge abutments and embankments increase risk and add over $100 million to maintenance expenses every year. New research reveals effective ways to deal with the bump problem. These include abutment and embankment on strong natural soil; long enough and strong enough approach slab; well compacted or stabilized fills; good fill material; good drainage; low embankments; adequate time period between fill placement and paving; good construction practice and inspection; and low track traffic.
