Sell the older home charm.
What a great place to live! If I were marketing a property in your neighborhood, I would be trumpeting the terrific recreations amenities and lifestyle. The buyer who wants a home in an established neighborhood that has character is not going to care much about traffic, especially if they can walk to restaurants and coffee shops.
If your home has great curb appeal that's a big bonus.
If your property backs up to the Interstate, what have you done about it? Are there trees? Is your home well insulated? Does your home have a sprawling front porch? Then this information needs to find its way into the advertising for your home.
I don't cover this area, but I would happy to refer someone.