Fatigue is process of progressive and permanent material damage under repeated loading. It is estimated that 50–90% of structural failure is due to fatigue, thus there is need for quality fatigue design tools. The highway construction industry has made rapid strides in technology up gradation and adaption. With increase in traffic volume and an increased demand for innovative design, there is scope for new concepts in rehabilitation and repair of aging transportation infrastructure. Fiber-reinforced concrete (FRC) is concrete containing fibrous material which increases its structural integrity. By 1960s, steel, glass and synthetic fibers such as polypropylene fibers were used in concrete. The concrete for pavement should be strong and durable necessitating High Performance Concrete (HPC) mixes. The present study attempts to illustrate the effect of length of poly propylene fibers (PPF) on strength and durability characteristics of HPC mixes. Local cement, sand, coarse aggregate were used along with requisite dosage of super plasticizer. A reference mix of M35 concrete with water cement ratio 0.4 has been considered for investigation. Effects of optimum percentage (0.4%) of polypropylene fibers of various lengths on the strength properties like Compressive Strength and durability properties like fatigue characteristics have been studied. Maximum compressive strength and maximum Flexural strength has been achieved at 28 days at an optimum dosage of PPFs of (0.4%) of length 12 and 20 mm. This project work aims at studying the fatigue behavior of simply supported beams of known size which are made with plain cement concrete and cement concrete with fibers under flexural loading. Static flexural test was also conducted to determine the flexural strength prior to fatigue testing. The studies briefly present the comparison of fatigue behavior of Plain Cement Concrete and Concrete with Fibers of known lengths with different stress ratios and the results are presented as Fatigue Stress and S–N relationship.