body {
    margin: 0;
    overflow: hidden;
}

.road {
    background: #808080;
    height: 100vh;
    overflow: hidden;
}

.car {
    background: #ff0000;
    width: 50px;
    height: 25px;
    position: absolute;
    bottom: 0;
    left: -50px;
    border-radius: 10px;
    animation: moveCar 4s linear infinite;
}

@keyframes moveCar {
    0% {
        transform: translateX(-50%);
    }
    100% {
        transform: translateX(100%);
    }
}