The　widely-utilized　multispan　simply-supported　adjacent　(side-by-side)　box　girder　bridges　often　suffer　from　problems　of　deterioration　attributable　to　transverse　cracking　in　link　slabs　between　spans,　malfunctioning　expansion　joints,　and　longitudinal　cracks　between　adjacent　girders.　Such　problems　can　degrade　the　functionality,　durability　or　even　safety　of　the　bridge　over　time,　depending　on　the　environmental　exposure　conditions.　This　paper　discusses　an　approach　taken　to　rehabilitate　the　Shili　Bridge　by　eliminating　expansion　joints　and　retrofitting　the　structure　from　simply-supported　box　girders　into　a　continuous　bridge.　Condition　assessments　were　performed　before　retrofitting.　In　addition,　several　design　options　and　construction　procedures　were　considered　and　analyzed.　Static　and　dynamic　load　tests　were　carried　out　after　the　completion　of　rehabilitation.　The　lessons　learned　in　this　project　are　presented　and　discussed.　This　practical　and　novel　methodology　is　a　step　forward　toward　improving　safety,　sustainability,　reliability,　and　quality　of　such　existing　bridges　in　China　and　elsewhere.