Some double-decker bridges only use one level for street traffic ; the Washington Avenue Bridge in Minneapolis reserves its lower level for automobile traffic and its upper level for pedestrian and bicycle traffic ( predominantly students at the University of Minnesota ).

Some bicycle parts, particularly hub-based gearing systems, are complex, and many cyclists prefer to leave maintenance and repairs to professional bicycle mechanics.

Some bicycle activists ( including some traffic management advisers ) seek the construction of segregated cycle facilities for journeys of all lengths.

Some bicycle clubs and national associations became prominent advocates for improvements to roads and highways.

Some bicycle paths are marked on some roadways, and very few separated paths are available to cyclists.

Some sources use the term to mean racing bicycle.

Some recumbent bicycle designs use longer frames than conventional bicycles.

Some distinguished writers have combined cycling with travel writing including Dervla Murphy, whose made her first documented journey in 1963 from London to India on a single speed bicycle with little more than a revolver and a change of underwear.

Some manufacturers also make bicycle cranks that can be adjusted to different lengths.

Some past sports that are no longer in competition include bicycle racing, Indian club juggling, wrestling, archery, and field hockey.

Some other events that would not normally be at a track and field meet today, were lawn tennis, wrestling, Indian club swing, horizontal and parallel bar performing, bicycle racing, sparring, and tug-of-war.

Some examples of bicycle lighting take advantage of the bottle cage by using it to hold a bottle-shaped battery to power the lights.

Some applications such as lawn mower throttles, automobile manual chokes, and some bicycle shifting systems require significant pushing ability and so use a cable with a solid inner wire.

Some experts suggest that many of these changes began during the earlier Golden age of the bicycle, from 1880 — 1915.

Some of the roads, however, are narrow which can lead to occasional traffic and bicycle congestion.

Some bicycle wheels are labeled in metric as " 700c " for a nominal 700 mm diameter road bike tire, but mountain bikes tend to use 26-inch wheels.

Some of the other sports included bicycle racing, professional boxing and tennis.

Some cities even decide to fund a public bicycle sharing system, despite the low attendances recorded.

Some racing bicycles, however, have a top tube that slopes down towards the rear of the bicycle ; the " compact " frame geometry was popularized by Giant.

Some modern racing bicycle helmets have a long tapering back end for streamlining.

Some road racing and club cyclists used a fixed-gear bicycle for training during the winter months, generally using a relatively low gear ratio, believed to help develop a good pedalling style.

Some consider that the enforced fast spin when descending increases suppleness or flexibility, which is said to improve pedalling performance on any type of bicycle ; however the performance boost is negligible compared to the benefits of riding a free wheel.

Some schools were technical -- the Belgians needed carpenters and mechanics to help exploit the land, and trained many.

Some workers in the field have also attempted to formulate hidden variable theories that exploit loopholes in actual experiments, such as the assumptions made in interpreting experimental data, although no theory has been proposed that can reproduce all the results of quantum mechanics.

Some of the mechanics, like hidden scoring or scoring at the end of the game, are also designed around this avoidance of player elimination.

Some modern day physicists and science writers such as Paul Davies and John Gribbin have argued that scientific finds in physics such as quantum mechanics and chaos theory have disproven materialism.

Some trajectories of a particle in a box according to Newton's laws of classical mechanics ( A ), and according to the Schrödinger equation of quantum mechanics ( B-F ).

Some authors divide digital role-playing games into two intertwined groups: single player games using RPG-style mechanics, and multiplayer games incorporating social interaction.

Some of the calculations are empirical or ' rule of thumb ' formulae, and others are based on classical mechanics.

Some chemical theorists apply statistical mechanics to provide a bridge between the microscopic phenomena of the quantum world and the macroscopic bulk properties of systems.

Some titles use additional statistics or additional conflict resolution mechanics.

Some trajectories of a harmonic oscillator according to Newton's laws of classical mechanics ( A-B ), and according to the Schrödinger equation of quantum mechanics ( C-H ).

Some of these results are presented in the statistical mechanics article.

Some games, especially commercial games, have a set limit based on available equipment ; others are limited by other mechanics of the game like time for each turn, while still others have no practical limit.

Some simple applications of Newtonian mechanics and / or materials sciences can supply correct approximations to the mechanics of many biological systems.

Some trajectories of a harmonic oscillator ( a ball attached to a Hooke's law | spring ) in classical mechanics ( A-B ) and quantum mechanics ( C-H ).

Some use game mechanics:

Some progress is being made in understanding the fault mechanics driving these earthquakes.

Some detractors thought his emphasis on the mechanics of the judicial system trivialized the office of Chief Justice.

Some of this can be explained away by the mechanics of imperfect competition ; what cannot be explained by traditional economics is described as X-inefficiency.

Some of these are present in all instances, others depend wholly on the specific mechanics of the weapon employed.