+1 what Guns and Roses has said, but it also depends on the circumstances of the access point and the amount of land available.
Large sites with significant frontages and front gardens may be able to offer two entrances.
However, where these are close to a junction the local authority may prefer an intensification of use of the existing entrance as opposed to a mutliplication of new entry points to a site.
This happened to me on a site in South Dublin a few years ago, but there were also other factors involved.
The Parks Department were interested in preserving biodiversity and thus hedgerows were protected, which meant we couldn't remove them to place a new entrance.
Either talk to your local planner or appoint and architect to act on your behalf.
If its a difficult road sightlines and safety matter you may need a Civil Engineers with road experience or a Road Traffic Consultant to argue your point.
The bottom line thinking seems to be that if its backland development, and you can get past the existing house to the side, you should be able to run that access out to the road.
HTH
ONQ.
[broken link removed]
All advice on AAM is remote from the situation and cannot be relied upon as a defence or support - in and of itself - should legal action be taken.
Competent legal and building professionals should be asked to advise in Real Life with rights to inspect and issue reports on the matters at hand