Police say the victim has suffered "horrendous, life-changing injuries".
Campaigner Keith Cass died on Thursday night after his cancer spread to his bones.
The collision at about 05:55 BST caused three lanes to be shut across both carriageways.
Asda incorrectly translates alcohol-free as "free alcohol"
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Mae dyn 74 oed mewn cyflwr difrifol wedi iddo gael ei saethu â bwa croes ar gyrion Caergybi fore Gwener.
Elusen yn galw am ddileu 'loteri cod post' yng Nghymru wedi i ddyn 80 oed â thrafferthion cerdded fethu â chael bathodyn glas.
Cofiwch gario bwced o ddŵr i gopa bryn, a thacluso eich mwstash...
15 sayings from around the world