This　study　examines　the　effects　of　parking　reservation　schemes　on　travel　choices　and　flow　distribution　in　a　commuting　system　comprising　regular　vehicles　(RVs)　and　shared　autonomous　vehicles　(SAVs),　when　faced　with　limited　parking　spaces.　All　possible　departure　patterns　under　three　parking　reservation　schemes　are　explored,　involving　unreserved　and　reserved　RV　commuters,　as　well　as　SAV　commuters.　Associated　factors,　such　as　the　number　of　parking　slots,　the　number　of　unreserved　slots,　and　the　additional　SAV　cost,　are　analyzed.　The　impacts　of　these　factors　on　various　metrics,　including　modal　split,　SAV　market　share,　traffic　congestion,　individual　travel　cost,　and　system　performance,　are　investigated.　Analytical　analysis　reveals　that　managing　the　numbers　of　parking　slots　and　unreserved　parking　slots　can　reduce　individual　travel　cost　and　alleviate　traffic　congestion.　Additionally,　the　study　suggests　an　optimal　reservation　scheme　for　the　number　of　parking　slots　and　the　ratio　of　unreserved　slots,　along　with　the　additional　SAV　cost,　to　minimize　total　travel　cost　and　maximize　system　efficiency.　These　findings　could　shape　future　urban　mobility　parking　policies,　accommodating　mixed　traffic　of　regular　and　autonomous　vehicles.