A travel control method executed by a travel control apparatus, the travel control apparatus comprising: a first detector configured to detect an obstacle around a subject vehicle traveling in a first lane; and a second detector configured to detect a second lane adjacent to the first lane, the travel control apparatus being configured to: set a first range at a target position for lane change in the second lane, the first range having a size equal to or larger than a size which the subject vehicle occupies on a road surface; detect a range in the second lane as a second range, the second range in the second lane being located at a side of the subject vehicle, the obstacle being absent in the second range in the second lane; and permit the subject vehicle to change lanes when the second range includes the first range, the travel control method comprising: a first step of determining a travel scene of the subject vehicle on a basis of a travel state of the subject vehicle, the travel control method being characterized by further comprising: a second step of acquiring a necessity level of lane change that is predetermined in the travel scene; and a third step of performing correction to reduce the first range or increase the second range when the necessity level is a first determination value or more as compared with when the necessity level is less than the first determination value. a first detector configured to detect an obstacle around a subject vehicle traveling in a first lane; and a second detector configured to detect a second lane adjacent to the first lane, the travel control apparatus being configured to: set a first range at a target position for lane change in the second lane, the first range having a size equal to or larger than a size which the subject vehicle occupies on a road surface; detect a range in the second lane as a second range, the second range in the second lane being located at a side of the subject vehicle, the obstacle being absent in the second range in the second lane; and permit the subject vehicle to change lanes when the second range includes the first range, the travel control method comprising: a first step of determining a travel scene of the subject vehicle on a basis of a travel state of the subject vehicle, the travel control method being characterized by further comprising: a second step of acquiring a necessity level of lane change that is predetermined in the travel scene; and a third step of performing correction to reduce the first range or increase the second range when the necessity level is a first determination value or more as compared with when the necessity level is less than the first determination value. set a first range at a target position for lane change in the second lane, the first range having a size equal to or larger than a size which the subject vehicle occupies on a road surface; detect a range in the second lane as a second range, the second range in the second lane being located at a side of the subject vehicle, the obstacle being absent in the second range in the second lane; and permit the subject vehicle to change lanes when the second range includes the first range, the travel control method comprising: a first step of determining a travel scene of the subject vehicle on a basis of a travel state of the subject vehicle, the travel control method being characterized by further comprising: a second step of acquiring a necessity level of lane change that is predetermined in the travel scene; and a third step of performing correction to reduce the first range or increase the second range when the necessity level is a first determination value or more as compared with when the necessity level is less than the first determination value. a first step of determining a travel scene of the subject vehicle on a basis of a travel state of the subject vehicle, the travel control method being characterized by further comprising: a second step of acquiring a necessity level of lane change that is predetermined in the travel scene; and a third step of performing correction to reduce the first range or increase the second range when the necessity level is a first determination value or more as compared with when the necessity level is less than the first determination value. a second step of acquiring a necessity level of lane change that is predetermined in the travel scene; and a third step of performing correction to reduce the first range or increase the second range when the necessity level is a first determination value or more as compared with when the necessity level is less than the first determination value.