Despite　of　intensive　investigations　on　transportation　dynamics　taking　place　on　complex　networks　with　fixed　structures,　a　deep　understanding　of　networks　consisting　of　mobile　nodes　is　challenging　yet,　especially　the　lacking　of　insight　into　the　effects　of　routing　strategies　on　transmission　efficiency.　We　introduce　a　distance-based　routing　strategy　for　networks　of　mobile　agents　toward　enhancing　the　network　throughput　and　the　transmission　efficiency.　We　study　the　transportation　capacity　and　delivering　time　of　data　packets　associated　with　mobility　and　communication　ability.　Interestingly,　we　find　that　the　transportation　capacity　is　optimized　at　moderate　moving　speed,　which　is　quite　different　from　random　routing　strategy.　In　addition,　both　continuous　and　discontinuous　transitions　from　free　flow　to　congestions　are　observed.　Degree　distributions　are　explored　in　order　to　explain　the　enhancement　of　network　throughput　and　other　observations.　Our　work　is　valuable　toward　understanding　complex　transportation　dynamics　and　designing　effective　routing　protocols.　©　2013　World　Scientific　Publishing　Company.