In practice, vehicle sharing systems met these expectations only to a very limited extent: Very flexible sharing systems for cars, bicycles or electric scooters developed dynamically in big cities, where it was quite easy to get around without a car already before. Outside urban agglomerations, carsharing is offered rarely and only under the condition that the vehicle must be returned to that point where it has been taken. Therefore, for many trips it is either impossible to cover only the "last mile" by carsharing unless the user pays an inadequately long rental period compared to a very short trip length.
An important reason for the lack of flexible carsharing in rural and suburban areas is the unsolved challenge of the redistribution of vehicles which is necessary to make them reliably available in the whole territory covered by the system. In central urban areas this problem is less significant as various origin-destination pairs with different trip purposes are rather compensating each other concerning the distribution of vehicles. If inequalities in distribution and availability of vehicles arise, public transport and taxis are always available. In rural and suburban areas the requirements are completely different: Carsharing must promise much higher reliability and massive use by commuters would lead to shortage of vehicles during the day in the outskirts and during the night in the centre of the respective region.
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The efficiency of vehicle redistribution can be increased by a sharing system based on two-seat light electric vehicles that are shorter than the width of an ISO container. On such vehicle, the Renault Twizy is already on the market and Microlino/Karo are announced to be introduced soon.
Within the length of a 40' container it is possible to park 8 Twizies in such way that every second gap is wide enough to step in or out of the vehicle. In this case it is better to park rearwards in order to facilitate access from the sidewalk, not from the driving lane:
Within the length of a 45' container it is possible to park 9 Microlinos resp. Karos, but only if they are parked alternately forward and backwards. These vehicles are accessed through the front, so 4 out of 9 vehicles must be entered from the driving lane.
The total mass of the parked vehicles is in both cases less than 5 metric tons. Similar to many bikesharing systems, vehicles can be taken and returned only at rental stations but the system offers the flexibility to return the vehicle at another station than that where it has been taken.
Part of the rental stations are frames complying to the dimensions of a 40' or 45' container with the standardized corner fittings. The whole time a vehicle is not rented by a user, it is parked on such a container-sized frame, connected by a charging cable to the container frame that is again electrically connected to the stationary part of the rental station. Each rental station includes several slots for such container frames leaving one of them empty at any time. Vehicles are taken and returned that way that there is always just one partly filled container frame, all other frames are either completely empty or completely full. If a rental station is close to running out of vehicles, fleet managers bring a container frame full of vehicles, put it into the empty slot and take an empty container frame in order to relocate it towards a rental station with an overflow of vehicles:
The lifting mechanism for the container handling is integrated into the rental station, perhaps similar to claws grids:
In terms of load-bearing capacity and quick handling controlled from the driver seat a stationary lifting mechanism seems to be more suitable than a truck-based container handling solution as loading cranes or side loaders.
Trucks that are not fully engaged in redistribution of carsharing vehicles can be meanwhile used for the transport of other containers.
▲ Initial situation: Vehicle sharing systems everywhere except where you need it ▲ Basic variant: container-based sharing and charging stations and vehicle redistribution ■ Optimized division of labour between carsharing, scheduled public transport and demand-responsive public transport
▼ Potential extension: Synergetic use of vehicles and drivers for demand-responsive public transport |
In order to achieve optimal rural and suburban mobility at reasonable costs for the public we need an optimized division of labour between the publicly accessible components means of transport:
▲ Initial situation: Vehicle sharing systems everywhere except where you need it ▲ Basic variant: container-based sharing and charging stations and vehicle redistribution ▲ Optimized division of labour between carsharing, scheduled public transport and demand-responsive public transport ■ Potential extension: Synergetic use of vehicles and drivers for demand-responsive public transport
▼ Potential extension: Synergetic interim use for scheduled public transport |
If the system is designed for 45' containers, such enlargement of the tractor unit for passenger transportation will lead to a total length of more than 16,5m making route-specific permits compulsory (at least under the legislation of Austria and some other EU countries):
▲ Initial situation: Vehicle sharing systems everywhere except where you need it ▲ Basic variant: container-based sharing and charging stations and vehicle redistribution ▲ Optimized division of labour between carsharing, scheduled public transport and demand-responsive public transport ▲ Potential extension: Synergetic use of vehicles and drivers for demand-responsive public transport ■ Potential extension: Synergetic interim use for scheduled public transport ▼ Potential extension: Application of narrow, tilting three-wheelers ▼ Potential extension: Saving space through lower container frames ▼ Potential extension: Additional offer of four-seat compact vehicles |
The required renaissance of semi-trailer buses is more realistic than it might seem at first glance because the requirement of communication between driver and passenger is meanwhile solved by emergency intercom and video surveillance and semi trailer bus operation might anyway be an option to achieve synergy between the decarbonisation of both bus and truck operation.
▲ Initial situation: Vehicle sharing systems everywhere except where you need it ▲ Basic variant: container-based sharing and charging stations and vehicle redistribution ▲ Optimized division of labour between carsharing, scheduled public transport and demand-responsive public transport ▲ Potential extension: Synergetic use of vehicles and drivers for demand-responsive public transport ▲ Potential extension: Synergetic interim use for scheduled public transport ■ Potential extension: Application of narrow, tilting three-wheelers ▼ Potential extension: Saving space through lower container frames ▼ Potential extension: Additional offer of four-seat compact vehicles |
Toyota i-ROAD and Nimbus Halo seem to have very similar dimensions, both have roughly this shape:
If every second spacing between the vehicles shall be minimum 50 cm wide it is possible to place 10 of them on a 40' container and 12 of them on a 45' container:
▲ Initial situation: Vehicle sharing systems everywhere except where you need it ▲ Basic variant: container-based sharing and charging stations and vehicle redistribution ▲ Optimized division of labour between carsharing, scheduled public transport and demand-responsive public transport ▲ Potential extension: Synergetic use of vehicles and drivers for demand-responsive public transport ▲ Potential extension: Synergetic interim use for scheduled public transport ▲ Potential extension: Application of narrow, tilting three-wheelers ■ Potential extension: Saving space through lower container frames ▼ Potential extension: Additional offer of four-seat compact vehicles |
▲ Initial situation: Vehicle sharing systems everywhere except where you need it ▲ Basic variant: container-based sharing and charging stations and vehicle redistribution ▲ Optimized division of labour between carsharing, scheduled public transport and demand-responsive public transport ▲ Potential extension: Synergetic use of vehicles and drivers for demand-responsive public transport ▲ Potential extension: Synergetic interim use for scheduled public transport ▲ Potential extension: Application of narrow, tilting three-wheelers ▲ Potential extension: Saving space through lower container frames ■ Potential extension: Additional offer of four-seat compact vehicles |
In order to reduce dependency from car ownership and consumption of critical battery resources even more, the flexible carsharing system could be improved by providing not only narrow two-seat light electric vehicles, but also wider vehicles for the transport of more than one child or much groceries. This would require the development of wider vehicles with more seats but anyway a width of less than 2,45m m to be parked transversely within the width of a standard ISO container: