2016-2023 exit reconstructions In the 1960s directional reconfiguration, there were three off-ramps added to Yerba Buena Island and Treasure Island: a single left-hand side exit in the western direction at the east end of the tunnel, a left-hand side exit in the eastern direction at the west end of the tunnel (originally signed as just "Treasure Island"), and a right-hand side exit in eastern direction at the east end of the tunnel (originally signed as just "Yerba Buena Island"). The eastbound left exit in particular presented an unusual hazard – drivers had to slow within the normal traffic flow and move into a very short off-ramp that ended in a short radius turn left turn; accordingly, a 15 MPH advisory was posted there. The turn had been further narrowed from its original design by the installation of crash pads on the island side. The eastbound and westbound on-ramps were then on the usual right-hand side, but they did not have dedicated merge lanes, forcing drivers to await gaps in traffic and then accelerate from a stop sign to traffic speeds in a short distance. In 2016, a new on-ramp and off-ramp at the east end of the tunnel were opened in the western direction on the right-hand side of the roadway, replacing the left-hand side off-ramp in that direction. Meanwhile, the eastbound right-hand side off-ramp and on-ramp at the east end of the tunnel was demolished during the reconstruction of the eastern span of the bridge. A new on-ramp on this side was built with a dedicated merge lane, but the off-ramp's replacement was not completed until early-May 2023, well after the bridge's bike path from the Oakland side to the island was fully completed. The eastbound left-hand side off-ramp and westbound on-ramp at the west end of the tunnel are then scheduled then close as early as late-May 2023 while the western span undergoes a seismic retrofit.
2016-2023 eXiT REcOnstrucTions IN tHE 1960s direcTIOnal REconFiGurAtIOn, tHEre wEre thRee ofF-Ramps aDdEd to yerba Buena island And tReasuRe islaNd: A sINgLE left-HaND SiDe EXit in thE WEstern dirEctioN at the East end of thE tunNel, a Left-Hand siDE EXit iN tHE eaSTeRn DirectIoN At The wesT End of tHe TUNNel (orIgiNally signed as jusT "TREAsure island"), anD a rigHt-hand SiDe eXit In eaStErN DirecTiOn at the east end of the TunneL (orIgInAllY sigNed as JUsT "yerba bUEna isLand"). the eaStBound lEFt exit IN particUlAr prEsenTeD an unusuAL hazard – dRiVeRs hAD To Slow WitHIn thE normaL trAFFic Flow AnD movE into a vERy sHoRt off-raMP tHat endeD In a shorT RAdius tURn lEFt tuRn; accOrdinGlY, a 15 MPh adVisORy wAs posTeD THere. thE Turn HAd bEen FuRtheR NaRroweD froM Its ORiginAl Design by thE iNstalLatIon of cRasH padS on tHe island side. thE EAstbound and wesTbOunD on-ramps WerE thEn oN thE uSUal rIGht-Hand Side, But thEy did not have dedICATEd merGe lanEs, forcing DrivERs to awaiT gaps In traffIC and Then AcceLerATe From a StoP Sign to TRAffIC sPeedS in a shOrT distanCe. in 2016, a new oN-rAMP and off-RAmp at The east eNd oF tHe tuNNeL wEre opEned in tHe wEStern dIrEction on The right-haNd sIdE of The RoaDway, rePlacInG tHe leFt-HAnD side oFf-rAmP In thAT diRectIon. meANwhiLe, the eaStbound right-hAnd side OfF-ramp And on-rAmp aT ThE eaSt enD oF the tuNnEl was dEMolisheD duRinG ThE rECOnstruction of THe EAstErn spAN of the BRIDge. A nEw On-ramp on this sIDe was buILt WiTH a DEdiCaTed merge lane, buT tHe oFF-ramP's replacEMent Was nOT completEd UNtiL eARly-may 2023, well AFter THe bridGe's BiKe pAth froM thE oaklanD Side To the islAnd was fulLy complEted. ThE EastbOUnd lEft-HAnd side ofF-rAmp AND WestbOund oN-ramp AT THe wesT eNd of The tuNneL are ThEN ScHeduled then CloSe aS EArly as laTe-mAy 2023 WhilE The western sPAn unDeRgoes a SEismiC retRofIt.