When taking your cat on a road trip, you can take the following measures to solve the problem of urination and defecation:
1. Bring a litter box so your cat can use it anytime in the car. Choose a litter box with low edges that makes it easy for your cat to get in and out.
2. During the journey, choose a safe place to stop when appropriate, let the cat get out of the car and relieve itself in a suitable place, and clean the litter box at the same time.

3. Keep the car interior relatively quiet to reduce stress on the cat, which helps the cat relax and relieve itself smoothly.
4. Avoid overfeeding before departure to prevent irritating the cat's stomach and intestines, which may affect its comfort in the car.
5. If the litter box is inconvenient to carry, you can prepare a small, airtight container filled with cat litter for emergency use. Also, bring cleaning supplies such as tissues and wet wipes for timely cleaning.