If you're taking a long road trip this summer, you might find it difficult to avoid fast food along the way.

Many times you find yourself in the car starving, but the highway rest stops are filled only with belt-busting fast food options. 

Dietitian Keri Glassman joined "Fox and Friends" with some tips on how to make healthier choices during your trip.


McDonald's

Glassman says many dieters can get tripped up at McDonald's by choosing a calorie-loaded salad that includes breaded chicken and dressing.

Instead, cut the calories in half by getting a simple hamburger (240 calories) with a side salad (50 calories), and go easy on the dressing. At breakfast, the Egg White Delight McMuffin contains just 250 calories.

To compare: a quarter-pound cheeseburger and a medium order of french fries packs 860 calories.


Chipotle

Be careful about what you put in your Burrito Bowl or salad, Glassman advises.

Here's the combo she recommends:

Lettuce, tomatoes, black beans, guacamole, and salsa, with just one scoop of meat. Leave out the rice and cheese. It'll only cost you 500-600 calories.

To compare: a standard burrito with chicken, white rice, pinto beans, lettuce, cheese, guacamole, and salsa tops out at more than 1,100 calories.


Wendy's

Glassman says this is one of the easiest fast food restaurants to find a healthy option.

Side salads are obviously a good choice, but since you're probably going to be hungrier than that... 

The small chili has 15 grams of protein and only 170 calories, while a baked potato without the butter, cheese or sour cream is another satisfying choice on the menu. 

To compare: a quarter-pound single cheeseburger with a medium order of french fries is about 1,000 calories.


Starbucks

You might need the cup of coffee, but be careful about adding on something like a carb-loaded muffin. 

Glassman pointed out that Starbucks sells a nutritious Veggie & Brown Rice Salad Bowl, which has only 430 calories and is packed with antioxidants.


See more healthy-eating tips on Keri's blog, including tips for sticking to your diet on vacation.