An analysis of the field of residual velocities of
OB-associations located within 3 kpc from the Sun revealed
periodic variations in the radial components of residual
velocities along the galactic radius-vector with a typical scale
length of lambda=2.0 ± 0.2 kpc and a mean amplitude of
fR = 7 ± km/s. The fact that radial residual velocities
of almost all OB-associations in rich stellar-gas complexes are
directed toward the Galactic center indicates that the solar
neighborhood considered is located inside the corotation radius.
The field of azimuthal velocities exhibits a conspicuous periodic
pattern with a mean amplitude of ftheta = 6 ± 2 km/s in
the 0 < l < 180° region and no periodic variations in the 180
< l < 360° region. The locations of the Cygnus and Perseus
arms as inferred from an analysis of the fields of radial and
azimuthal velocities agree with each other. The periodic patterns
of the fields of residual velocities of Cepheids and
OB-associations are found to have many common features.