Arlington County has an extensive network of bicycle infrastructure, including 50 miles of shared-use off-street trails. These multi-use trails are generally 10 feet wide with a solid yellow line striped down the middle to separate users.
Constructive mathematics. Idea. Broadly speaking, constructive mathematics is mathematics done without the principle of excluded middle (or other principles, such as the full axiom of choice, that imply it).
2. constructive-emphasizing what is laudable or hopeful or to the good; constructive criticism. positive-characterized by or displaying affirmation or acceptance or certainty etc.; a positive attitude; the reviews were all positive; a positive benefit; a positive demand.he Republic by Plato View in context. This may serve as a specimen of the numerous handles which would be given to the doctrine of constructive powers, by the indulgence of an injudicious zeal for bills of rights.