The Straits of Bab al Mandab bridge would be intercontinental bridges between the Arabian Peninsula and the Horn of Africa and would cross the Red Sea. A Gibraltar bridge would be between Spain and Morocco would connecting the Atlantic Ocean to the Mediterranean Sea.

Several engineers have advanced designs for the Gibraltar Bridge on various alignments and with differing structural configurations. Professor T.Y. Lin's proposal for a crossing between Point Oliveros and Point Cires was designed with 14,000 meter length, deep piers, and 5000-meter spans.

10 GPa-strong carbon nanotube fibers are today available (Koziol et al 2007), suggesting that long cables with a similar strength could be realized in the near future. Those new materials could make super-bridges more feasible.

OPAC Engineers ere engaged by Professor Lin to study structural configurations, stiffening systems, and aerodynamic performance issues for the Oliveros-Cires crossing's 5000 m spans. Professor Lin's proposed a hybrid stayed-suspension bridge concept. The hybrid stayed-suspension bridge was developed into the most suitable alternative, with greater rigidity and better aerodynamic characteristics than competing systems with much smaller spans. They estimated a $15 billion cost.