The　boundary　feedback　control　of　networks　of　freeway　traffic　is　considered　in　this　article　by　means　of　the　partial　differential　equation　(PDE)-based　techniques.　The　control　and　measurements　are　all　located　at　the　boundaries　of　each　link.　We　have　established　the　boundary　control　model　for　the　system,　a　linear　hyperbolic　system　of　balance　laws,　which　includes　not　only　the　traffic　flow　dynamics　of　the　network　described　by　combining　the　linearized　Aw-Rascle-Zhang　(ARZ)　traffic　flow　model　of　each　link　but　also　the　integrated　on-ramping　metering　and　variable　speed　limit　control　modeled　as　the　boundary　condition.　As　the　traffic　demand　of　the　network　is　fluctuated,　the　boundary　input-to-state　stability　(ISS)　controller　is　designed　to　suppress　the　disturbance　and　regulate　the　traffic　flow　into　the　boundedness　regions　of　the　desired　states.　Based　on　a　novel　Lyapunov　function,　some　sufficient　conditions　in　terms　of　the　matrix　inequalities　are　derived　for　the　ISS　boundary　stabilization　in　the　L-2-norm.　The　numerical　simulation　is　given　to　illustrate　the　effectiveness　of　the　developed　boundary　feedback　control.　Moreover,　an　interesting　traffic　experiment　is　carried　out　by　using　the　traffic　simulation　software,　AIMSUN,　and　some　specific　traffic　data　are　collected　and　analyzed　to　verify　the　feasibility　and　effectiveness　of　the　boundary　control.