Convertible Car Seats: Once the baby outgrows the infant carrier, the Sit N' Stroll is an excellent option, because it's a convertible car seat (birth to 30lbs. rear-facing and 22-40lbs. forward facing) with a built-in stroller. While you can install any convertible car seat in a taxi, the Sit N' Stroll is unique because you don't have to carry the car seat--you simply use it as a stroller until you need to get into a vehicle.

Due to the placement of the belt routing path (over the baby’s legs for rear-facing and across the baby’s chest for forward-facing) you must install the Sit N' Stroll with the child in the seat and uninstall the car seat before removing the child from the seat. This is fine for use in taxis and in other situations when you won't be leaving the seat in the vehicle, but isn't practical for everyday use in your own vehicle.

Also note that due to the size and shape of the Sit N’ Stroll it's usually not possible to get it installed to less than 1 inch of side-to-side movement when using it rear-facing. Most parents can get an infant carrier like the Graco Safe Seat installed more securely – so using an infant carrier with a higher weight limit before switching to the Sit N’ Stroll is a wise idea.

When using the Sit N’ Stroll forward facing, it's very important to use the tether strap whenever possible, as this will reduce how much the child’s head moves forward by at least 4 inches.

The Radian, a new convertible seat by Sunshine Kids, is unique in that it folds flat (6 inches). It accommodates children up to 35 pounds rear-facing (although many find it difficult to get a secure installation rear-facing due to the location of the safety belt/LATCH belt routing path.) It's a forward-facing car seat for children up to 65 pounds. The compact nature of this car seat and its optional travel bag makes it convenient for travel, but due to its weight (20 lbs), some parents might find it too heavy and may prefer to use a travel bag with wheels or an entirely different seat.

Combination Seats: The Safeguard Go is a car seat with a 5-point harness for children 30-60 pounds who are at least 1 year of age and at least 34 inches tall. This seat has many advantages for travel since it folds compactly into its own travel bag and weighs just 9.5 pounds. It can be installed in less than 1 minute in any vehicle with a tether anchor (all vehicles model year 2000 and newer in the US have tether anchors factory installed.)