Before forming an opinion, one might have to examine relevant records including the nature of your rights, the extent of right of ingress and egress you presently enjoy etc. It is also necessary and crucial to examine the Layout plan approval granted to the builder. Further under Section 32(5) of the Karnataka Urban Developer Act, there seems to be a requirement on a developer to transfer roads and other public works in a layout after the development to the Authority. In that case, the roads may not be the private property of the Developer. These aspects would require further scrutiny keeping in view the particulars of your case.