An inventory management system, comprising: a management system; a materials handling facility; a plurality of autonomous guided vehicles, AGVs, (110, 124, 220, 292, 310, 504, 506, 508) configured to move within the materials handling facility according to generated paths, each AGV of the plurality of AGVs comprising: a receiver configured to receive radio signals; and a transmitter configured to communicate with the management system; and the materials handling facility comprising: a first radio (112, 518) located at a first distance from a first area of the materials handling facility, the first radio configured to transmit a first signal at a first frequency to cause a particular AGV of the plurality of AGVs to reduce a current traveling speed (116, 524); and a second radio (114, 520) located at a second distance from the first area, the second radio configured to transmit a second signal at a second frequency to cause the particular AGV to stop moving (118, 526), the management system configured to: receive, from the particular AGV, information identifying a location of the particular AGV within the materials handling facility and an indication of the particular AGV receiving the first signal or the second signal via the receiver of the particular AGV; generate new paths for one or more AGVs of the plurality of AGVs within the materials handling facility thereby avoiding the first area; and provide the new paths to the one or more AGVs of the plurality of AGVs. a management system; a materials handling facility; a plurality of autonomous guided vehicles, AGVs, (110, 124, 220, 292, 310, 504, 506, 508) configured to move within the materials handling facility according to generated paths, each AGV of the plurality of AGVs comprising: a receiver configured to receive radio signals; and a transmitter configured to communicate with the management system; and a receiver configured to receive radio signals; and a transmitter configured to communicate with the management system; and the materials handling facility comprising: a first radio (112, 518) located at a first distance from a first area of the materials handling facility, the first radio configured to transmit a first signal at a first frequency to cause a particular AGV of the plurality of AGVs to reduce a current traveling speed (116, 524); and a second radio (114, 520) located at a second distance from the first area, the second radio configured to transmit a second signal at a second frequency to cause the particular AGV to stop moving (118, 526), the management system configured to: receive, from the particular AGV, information identifying a location of the particular AGV within the materials handling facility and an indication of the particular AGV receiving the first signal or the second signal via the receiver of the particular AGV; generate new paths for one or more AGVs of the plurality of AGVs within the materials handling facility thereby avoiding the first area; and provide the new paths to the one or more AGVs of the plurality of AGVs. a first radio (112, 518) located at a first distance from a first area of the materials handling facility, the first radio configured to transmit a first signal at a first frequency to cause a particular AGV of the plurality of AGVs to reduce a current traveling speed (116, 524); and a second radio (114, 520) located at a second distance from the first area, the second radio configured to transmit a second signal at a second frequency to cause the particular AGV to stop moving (118, 526), the management system configured to: receive, from the particular AGV, information identifying a location of the particular AGV within the materials handling facility and an indication of the particular AGV receiving the first signal or the second signal via the receiver of the particular AGV; generate new paths for one or more AGVs of the plurality of AGVs within the materials handling facility thereby avoiding the first area; and provide the new paths to the one or more AGVs of the plurality of AGVs. receive, from the particular AGV, information identifying a location of the particular AGV within the materials handling facility and an indication of the particular AGV receiving the first signal or the second signal via the receiver of the particular AGV; generate new paths for one or more AGVs of the plurality of AGVs within the materials handling facility thereby avoiding the first area; and provide the new paths to the one or more AGVs of the plurality of AGVs.