This paper wish to make a presentation of the possibility to use glass and polyester fiber waste in making highway cold recycling better, easier and cheaper. For this purpose we have studied the influence of the fibers (glass and polyester) on some experimental sectors, from our country, Sălaj district, Transylvania. Glass and polyester fiber waste can be used like disperse reinforcing materials in highway superstructures in so called cold recycling technology. The fibers are throughput in the matrix for better physical and mechanical properties of the final product. This technique will give better highway surface, cheaper costs per rehabilitated kilometer and diminution of the waste that some industries are making.Most studies from this scientific sector are gravening above the realization of brand new superstructures ignoring the possibility to recycling the existing layers with or without other materials in addition. The period that we are passing is one characterized by intense preoccupations oriented on the economically aspect, much more over the big investments like are highways and bridges - were the cheaper solution is the winner.There are some problems in spreading and dosage of the fibers in the system to ensure the reinforcing function. For the recycled complex (aggregates, bitumen, cement, water and fibers) we will use the generically denomination of matrix. The improvement of physical, mechanical and chemical properties of the matrix constitutes problems that are hard to solve in a very short time. Regarding the fibers the biggest problem is the dosage and homogenization in the structure. To attend this purpose fiber need to have the correct length ant the correct spread in the matrix.We had make a bibliography documentation, that encourage us to believe that using some alternative solutions will obtain very good results also in our country, that have the well-known problems regarding its highway infrastructure.