high-visibility billboard mockup above a bustling highway, surrounded by speeding cars and glowing buildings, with a

billboard mockup city urban area densely populated panoramic cityscape modern rooftop historical buildings crowded streets people sky clear lighting visible distance environment vibrant bustling mix architecture dynamic signage advertising high definition scene visibility life living highway metropolitan blank ad space attention drivers movement cars speed lights tall reflective windows glow twilight gradient drama fast paced energetic impactful ai generated