Innovative thinking in engineering 5km Classical Suspension 1km 3km 1km 2:Hybrid Double-Cantilever Suspension 8 3:Hybrid Cable-Stayed SuspensionInnovative thinking in engineering • The alternative of 14km route crossing the gulf was adopted, three piers were built with 450m pile foundation • The mixed type Gibraltar bridge uses suspension bridge spanned 3000m in the middle and a cantilever for both 1000m to support the cable in the middle by inclined struts at the both sides