I guess different countries have different rules, but my country have classes of roads which are not shared with pedestrians or bikes. There are generally not t

I guess different countries have different rules, but my country have classes of roads which are not shared with pedestrians or bikes. There are generally not that many traffic lights, but there are exceptions. The biggest use of simultaneously acceleration in those situations would be around road maintenance and other situation where road speed or number of lanes are reduced, with heavy congestion as a result.