If you really wish to resolve this issue focus on you and not his behavior. Learn about what enabling behaviors are. Learn about boundaries. Learn about self-care. The more you heal yourself the more clarity you will have about your relationship.
I spent 17 years with an addict wishing, waiting, and hoping that he would change. I did all the classic enabling behaviors from denial to completley taking the blame. Fortunately, about 9 years into our marraige I clued in and started to heal myself. I quit focusing on changing him and really got down to finding what was in me that was contributing to the mess that was my marraige. Healing myself allowed me to understand the dynamics that were really going on in the relationship and to make clear choices about what I needed to do (not what he needed to do).
Whether your husband should or shouldn't drink as much or when he is doesn't matter. What does matter is that he is. You cannot change him. If you sit around waiting for him to change or spend all of your energy trying to change him you will miss the opportunity to care for yourself and your children. You need to be in a position of empowerment for yourself. Empowerement means you have choice. You do not get to choose whether he changes or not. You do get to choose how you respond to his behaviors.
For example, if your concern is his health, then you can arrange things to be put into place that create safety for you and your children financially such as health insurace, long-term care insurance, and life insurance. If he is drinking and driving then you have some choices to make, all the way from never getting in the car with him driving to contacting the police. There are so many choices you can make that support you and your children.
Of course, communicating openly, clearly, and directly will always be a key. If your intention in communicating is to change his behavior little will likely change, in fact, he will probably just get defensive. If your intention is to share how you are feeling, to state how it is effecting you and the children, and to set a boundary you will have much more success.
I currently have a client that I have worked with for about two years now whose husband drank heavily and she was at the end of her rope. Her husband did stop drinking, however many of the behaviors that were an issue in the relationship were still there. I supported her in changing the focus from his drinking or even his behaviors to what was going on inside of her. What were her fears. What were her enabling behaviors such as lack of boundaries, lack of communciation, withdrawl, and blaming.
She is doing really well now. They are still married and both engaged in working on the relationship. She is learning to create boundaries and to communicate in a healthy manner in all areas of her life. Most importantly, she is taking 100% responsibility for her own well-being by becoming aware of her own irrational core beliefs and questioning them deeply. She is focused on herself, not her husband, which has created the space for him to focus on himself.