Colorful cartoon illustration in A3 landscape format, depicting a crowded scene of 100 cartoon characters engaged in various activities at a railway tunnel construction site. Each character is clearly visible from the front, creating an organized-chaos arrangement reminiscent of 'Where's Waldo.' The scene features vibrant, exaggerated characters in hard hats and safety vests operating whimsical heavy machinery like oversized excavators and cartoonish tunnel boring machines, while others are using comically large shovels and pickaxes to dig. Among the crowd is a distinctive cartoon geologist, recognized by his geological hard hat with a quirky logo, oversized safety goggles, and a vest filled with rock samples and colorful tools. He enthusiastically examines a rock formation at the tunnel entrance, holding a cartoon-style geological hammer in one hand and a giant notepad in the other, taking notes on the soil composition. Other characters include a cheerful foreman directing traffic with a giant walkie-talkie; engineers with exaggerated features studying oversized blueprints spread out on a table; a safety officer checking cartoonishly large equipment with a clipboard; and a surveyor humorously measuring distances with an oversized laser rangefinder. In the background, some characters are playfully mixing concrete with silly expressions, while others are installing whimsical railway tracks in the tunnel. Some laborers are using funny welding torches to secure metal pieces, while others are applying bright waterproofing materials to the tunnel walls. A group of children in toy construction hats watches in delight, while a cartoon dog runs around playfully. The scene is filled with vibrant colors and exaggerated features, capturing the fun and lively atmosphere of a [...]