bicycle bicycles bike bike street bikes blue german germany hike path road roadsign sign atomic black danger fusion laboratory nucleon pentagon pictogram radiation red science security yellow beware caution construction dig triangle warning worker auxiliary bend crossroads isolated junction main priority secondary turning unusual Genessaret Israel kinneret Lake Tiberias roadside sea level Sea of Galilee view water 3-D advice communicating communication conditional conditions eye-catching glassy indication information informative informing insiders limited-access liquidy no-public-access notification notifying plastic prohibition raised restriction semi-transparent signs staff staff-only words workers appearance arrow color coloration colored colour coloured expressing expression golden surface surfaced surfaces surfacing symbolic tactile texture textured textures animal drive safety street traffic travel vehicle